diff --git a/examples/brightness-contrast.js b/examples/brightness-contrast.js
index 47b9c66e8d..863d75792f 100644
--- a/examples/brightness-contrast.js
+++ b/examples/brightness-contrast.js
@@ -3,7 +3,7 @@ goog.require('ol.Map');
 goog.require('ol.RendererHint');
 goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 function setResetBrightnessButtonHTML() {
@@ -23,7 +23,7 @@ if (!ol.BrowserFeature.HAS_WEBGL) {
   info.style.display = '';
 } else {
   var layer = new ol.layer.Tile({
-    source: new ol.source.MapQuestOpenAerial()
+    source: new ol.source.MapQuest({layer: 'sat'})
   });
 
   var map = new ol.Map({
diff --git a/examples/drag-rotate-and-zoom.js b/examples/drag-rotate-and-zoom.js
index 328b2a817d..573a31438d 100644
--- a/examples/drag-rotate-and-zoom.js
+++ b/examples/drag-rotate-and-zoom.js
@@ -4,7 +4,7 @@ goog.require('ol.View2D');
 goog.require('ol.interaction');
 goog.require('ol.interaction.DragRotateAndZoom');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 var map = new ol.Map({
@@ -13,7 +13,7 @@ var map = new ol.Map({
   ]),
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     })
   ],
   renderers: ol.RendererHints.createFromQueryData(),
diff --git a/examples/draw-features.js b/examples/draw-features.js
index a61b246f94..76fde2ebc9 100644
--- a/examples/draw-features.js
+++ b/examples/draw-features.js
@@ -5,7 +5,7 @@ goog.require('ol.interaction');
 goog.require('ol.interaction.Draw');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.Vector');
 goog.require('ol.style.Circle');
 goog.require('ol.style.Fill');
@@ -13,7 +13,7 @@ goog.require('ol.style.Stroke');
 goog.require('ol.style.Style');
 
 var raster = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var styleArray = [new ol.style.Style({
diff --git a/examples/dynamic-data.js b/examples/dynamic-data.js
index 14be6dfaaa..31ec3cec8f 100644
--- a/examples/dynamic-data.js
+++ b/examples/dynamic-data.js
@@ -3,7 +3,7 @@ goog.require('ol.RendererHint');
 goog.require('ol.View2D');
 goog.require('ol.geom.MultiPoint');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.style.Circle');
 goog.require('ol.style.Fill');
 goog.require('ol.style.Stroke');
@@ -12,7 +12,7 @@ goog.require('ol.style.Stroke');
 var map = new ol.Map({
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     })
   ],
   renderer: ol.RendererHint.CANVAS,
diff --git a/examples/layer-group.js b/examples/layer-group.js
index b7f7d8ec6c..057fdbfb80 100644
--- a/examples/layer-group.js
+++ b/examples/layer-group.js
@@ -5,13 +5,13 @@ goog.require('ol.dom.Input');
 goog.require('ol.layer.Group');
 goog.require('ol.layer.Tile');
 goog.require('ol.proj');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.TileJSON');
 
 var map = new ol.Map({
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     }), new ol.layer.Group({
       layers: [
         new ol.layer.Tile({
diff --git a/examples/mapquest.html b/examples/mapquest.html
index a47e4442c5..66684b11f1 100644
--- a/examples/mapquest.html
+++ b/examples/mapquest.html
@@ -25,6 +25,11 @@
       <div class="row-fluid">
         <div class="span12">
           <div id="map" class="map"></div>
+          <select id="layer-select">
+            <option value="Aerial">Aerial</option>
+            <option value="AerialWithLabels">Aerial with labels</option>
+            <option value="Road" selected>Road</option>
+          </select>
         </div>
       </div>
 
@@ -43,6 +48,7 @@
 
     </div>
 
+    <script src="jquery.min.js" type="text/javascript"></script>
     <script src="loader.js?id=mapquest" type="text/javascript"></script>
     <script src="../resources/example-behaviour.js" type="text/javascript"></script>
 
diff --git a/examples/mapquest.js b/examples/mapquest.js
index 9a0dd92920..6a35142d07 100644
--- a/examples/mapquest.js
+++ b/examples/mapquest.js
@@ -1,22 +1,52 @@
 goog.require('ol.Map');
 goog.require('ol.RendererHints');
 goog.require('ol.View2D');
+goog.require('ol.layer.Group');
 goog.require('ol.layer.Tile');
 goog.require('ol.proj');
-goog.require('ol.source.MapQuestOSM');
+goog.require('ol.source.MapQuest');
 
 
+var layers = [
+  new ol.layer.Tile({
+    style: 'Road',
+    source: new ol.source.MapQuest({layer: 'osm'})
+  }),
+  new ol.layer.Tile({
+    style: 'Aerial',
+    visible: false,
+    source: new ol.source.MapQuest({layer: 'sat'})
+  }),
+  new ol.layer.Group({
+    style: 'AerialWithLabels',
+    visible: false,
+    layers: [
+      new ol.layer.Tile({
+        source: new ol.source.MapQuest({layer: 'sat'})
+      }),
+      new ol.layer.Tile({
+        source: new ol.source.MapQuest({layer: 'hyb'})
+      })
+    ]
+  })
+];
+
 var map = new ol.Map({
-  layers: [
-    new ol.layer.Tile({
-      source: new ol.source.MapQuestOSM()
-    })
-  ],
+  layers: layers,
   renderers: ol.RendererHints.createFromQueryData(),
   target: 'map',
   view: new ol.View2D({
     center: ol.proj.transform(
-        [139.6917, 35.689506], 'EPSG:4326', 'EPSG:3857'),
+        [-73.979378, 40.702222], 'EPSG:4326', 'EPSG:3857'),
     zoom: 9
   })
 });
+
+$('#layer-select').change(function() {
+  var style = $(this).find(':selected').val();
+  var i, ii;
+  for (i = 0, ii = layers.length; i < ii; ++i) {
+    layers[i].set('visible', (layers[i].get('style') == style));
+  }
+});
+$('#layer-select').trigger('change');
diff --git a/examples/overlay.js b/examples/overlay.js
index e4e036c099..fb62b58a55 100644
--- a/examples/overlay.js
+++ b/examples/overlay.js
@@ -6,11 +6,11 @@ goog.require('ol.View2D');
 goog.require('ol.coordinate');
 goog.require('ol.layer.Tile');
 goog.require('ol.proj');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 var layer = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var map = new ol.Map({
diff --git a/examples/semi-transparent-layer.js b/examples/semi-transparent-layer.js
index ece1ec4b69..463b6c866b 100644
--- a/examples/semi-transparent-layer.js
+++ b/examples/semi-transparent-layer.js
@@ -3,14 +3,14 @@ goog.require('ol.RendererHints');
 goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
 goog.require('ol.proj');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.TileJSON');
 
 
 var map = new ol.Map({
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     }),
     new ol.layer.Tile({
       source: new ol.source.TileJSON({
diff --git a/examples/side-by-side.js b/examples/side-by-side.js
index 304117071d..f526d63efe 100644
--- a/examples/side-by-side.js
+++ b/examples/side-by-side.js
@@ -3,13 +3,13 @@ goog.require('ol.Map');
 goog.require('ol.RendererHint');
 goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 var domMap = new ol.Map({
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     })
   ],
   renderer: ol.RendererHint.DOM,
diff --git a/examples/vector-layer.js b/examples/vector-layer.js
index 413837f406..7905afc1b1 100644
--- a/examples/vector-layer.js
+++ b/examples/vector-layer.js
@@ -5,7 +5,7 @@ goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.render.FeaturesOverlay');
 goog.require('ol.source.GeoJSON');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.style.Fill');
 goog.require('ol.style.Stroke');
 goog.require('ol.style.Style');
@@ -33,7 +33,7 @@ var vectorLayer = new ol.layer.Vector({
 var map = new ol.Map({
   layers: [
     new ol.layer.Tile({
-      source: new ol.source.MapQuestOpenAerial()
+      source: new ol.source.MapQuest({layer: 'sat'})
     }),
     vectorLayer
   ],
diff --git a/examples/wms-image.js b/examples/wms-image.js
index 1e25cb53e2..c752304978 100644
--- a/examples/wms-image.js
+++ b/examples/wms-image.js
@@ -4,12 +4,12 @@ goog.require('ol.View2D');
 goog.require('ol.layer.Image');
 goog.require('ol.layer.Tile');
 goog.require('ol.source.ImageWMS');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 var layers = [
   new ol.layer.Tile({
-    source: new ol.source.MapQuestOpenAerial()
+    source: new ol.source.MapQuest({layer: 'sat'})
   }),
   new ol.layer.Image({
     source: new ol.source.ImageWMS({
diff --git a/examples/wms-tiled.js b/examples/wms-tiled.js
index 1afc715f4f..b5315579b4 100644
--- a/examples/wms-tiled.js
+++ b/examples/wms-tiled.js
@@ -2,13 +2,13 @@ goog.require('ol.Map');
 goog.require('ol.RendererHint');
 goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.TileWMS');
 
 
 var layers = [
   new ol.layer.Tile({
-    source: new ol.source.MapQuestOpenAerial()
+    source: new ol.source.MapQuest({layer: 'sat'})
   }),
   new ol.layer.Tile({
     source: new ol.source.TileWMS({
diff --git a/examples/zoomslider.js b/examples/zoomslider.js
index 26daf9b05f..5066a52c63 100644
--- a/examples/zoomslider.js
+++ b/examples/zoomslider.js
@@ -2,7 +2,7 @@ goog.require('ol.Map');
 goog.require('ol.View2D');
 goog.require('ol.control.ZoomSlider');
 goog.require('ol.layer.Tile');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 
 
 /**
@@ -14,7 +14,7 @@ goog.require('ol.source.MapQuestOpenAerial');
 var createMap = function(divId) {
   var source, layer, map, zoomslider, resolutions;
 
-  source = new ol.source.MapQuestOpenAerial();
+  source = new ol.source.MapQuest({layer: 'sat'});
   layer = new ol.layer.Tile({
     source: source
   });
diff --git a/old/examples/gml.js b/old/examples/gml.js
index d36b2fb8ad..d5571de07b 100644
--- a/old/examples/gml.js
+++ b/old/examples/gml.js
@@ -4,14 +4,14 @@ goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.parser.ogc.GML_v3');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.Vector');
 goog.require('ol.style.Fill');
 goog.require('ol.style.Stroke');
 goog.require('ol.style.Style');
 
 var raster = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var vector = new ol.layer.Vector({
diff --git a/old/examples/modify-features.js b/old/examples/modify-features.js
index 18550d8b68..e74c19ef5f 100644
--- a/old/examples/modify-features.js
+++ b/old/examples/modify-features.js
@@ -7,7 +7,7 @@ goog.require('ol.interaction.Select');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.parser.ogc.GML_v3');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.Vector');
 goog.require('ol.style.Fill');
 goog.require('ol.style.Rule');
@@ -16,7 +16,7 @@ goog.require('ol.style.Stroke');
 goog.require('ol.style.Style');
 
 var raster = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var vector = new ol.layer.Vector({
diff --git a/old/examples/select-features.js b/old/examples/select-features.js
index 6eb227f101..55a2e2bd85 100644
--- a/old/examples/select-features.js
+++ b/old/examples/select-features.js
@@ -6,7 +6,7 @@ goog.require('ol.interaction.Select');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.parser.ogc.GML_v3');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.Vector');
 goog.require('ol.style.Fill');
 goog.require('ol.style.Rule');
@@ -14,7 +14,7 @@ goog.require('ol.style.Stroke');
 goog.require('ol.style.Style');
 
 var raster = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var vector = new ol.layer.Vector({
diff --git a/old/examples/vector-layer-sld.js b/old/examples/vector-layer-sld.js
index 89f2ba710d..4881a4d965 100644
--- a/old/examples/vector-layer-sld.js
+++ b/old/examples/vector-layer-sld.js
@@ -7,12 +7,12 @@ goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.parser.GeoJSON');
 goog.require('ol.parser.ogc.SLD');
-goog.require('ol.source.MapQuestOpenAerial');
+goog.require('ol.source.MapQuest');
 goog.require('ol.source.Vector');
 
 
 var raster = new ol.layer.Tile({
-  source: new ol.source.MapQuestOpenAerial()
+  source: new ol.source.MapQuest({layer: 'sat'})
 });
 
 var xhr = new XMLHttpRequest();
diff --git a/src/objectliterals.jsdoc b/src/objectliterals.jsdoc
index c787d828be..3ffc24984c 100644
--- a/src/objectliterals.jsdoc
+++ b/src/objectliterals.jsdoc
@@ -592,6 +592,7 @@
 
 /**
  * @typedef {Object} olx.source.MapQuestOptions
+ * @property {string} layer Layer.
  * @property {ol.TileLoadFunctionType|undefined} tileLoadFunction Optional
  *     function to load a tile given a URL.
  * @todo stability experimental
diff --git a/src/ol/browserfeature.js b/src/ol/browserfeature.js
index c7a30bb633..ab229e2cfa 100644
--- a/src/ol/browserfeature.js
+++ b/src/ol/browserfeature.js
@@ -30,11 +30,11 @@ ol.ENABLE_WEBGL = true;
 
 
 /**
-* The ratio between physical pixels and device-independent pixels
-* (dips) on the device (`window.devicePixelRatio`).
-* @const {number}
-* @todo stability experimental
-*/
+ * The ratio between physical pixels and device-independent pixels
+ * (dips) on the device (`window.devicePixelRatio`).
+ * @const {number}
+ * @todo stability experimental
+ */
 ol.BrowserFeature.DEVICE_PIXEL_RATIO = goog.global.devicePixelRatio || 1;
 
 
@@ -87,10 +87,10 @@ ol.BrowserFeature.HAS_GEOLOCATION = 'geolocation' in goog.global.navigator;
 
 
 /**
-* True if browser supports touch events.
-* @const {boolean}
+ * True if browser supports touch events.
+ * @const {boolean}
  * @todo stability experimental
-*/
+ */
 ol.BrowserFeature.HAS_TOUCH = ol.ASSUME_TOUCH ||
     (goog.global.document &&
     'ontouchstart' in goog.global.document.documentElement) ||
diff --git a/src/ol/layer/layergroup.js b/src/ol/layer/layergroup.js
index 89fb0b5256..0a0cf482e1 100644
--- a/src/ol/layer/layergroup.js
+++ b/src/ol/layer/layergroup.js
@@ -205,7 +205,6 @@ ol.layer.Group.prototype.getLayerStatesArray = function(opt_obj) {
     layerState.hue += ownLayerState.hue;
     layerState.opacity *= ownLayerState.opacity;
     layerState.saturation *= ownLayerState.saturation;
-    layerState.sourceState = this.getSourceState();
     layerState.visible = layerState.visible && ownLayerState.visible;
     layerState.maxResolution = Math.min(
         layerState.maxResolution, ownLayerState.maxResolution);
@@ -221,30 +220,5 @@ ol.layer.Group.prototype.getLayerStatesArray = function(opt_obj) {
  * @inheritDoc
  */
 ol.layer.Group.prototype.getSourceState = function() {
-  // Return the layer group's source state based on the best source state of its
-  // children:
-  // - if any child is READY, return READY
-  // - otherwise, if any child is LOADING, return LOADING
-  // - otherwise, all children must be in ERROR, return ERROR
-  // - otherwise, there are no children, return READY
-  var layerSourceStates = [0, 0, 0];
-  var layers = this.getLayers().getArray();
-  var n = layers.length;
-  var i;
-  for (i = 0; i < n; ++i) {
-    var layerSourceState = layers[i].getSourceState();
-    goog.asserts.assert(layerSourceState < layerSourceStates.length);
-    ++layerSourceStates[layerSourceState];
-  }
-  if (layerSourceStates[ol.source.State.READY]) {
-    return ol.source.State.READY;
-  } else if (layerSourceStates[ol.source.State.LOADING]) {
-    return ol.source.State.LOADING;
-  } else if (layerSourceStates[ol.source.State.ERROR]) {
-    goog.asserts.assert(layerSourceStates[ol.source.State.ERROR] == n);
-    return ol.source.State.ERROR;
-  } else {
-    goog.asserts.assert(n === 0);
-    return ol.source.State.READY;
-  }
+  return ol.source.State.READY;
 };
diff --git a/src/ol/source/mapquestsource.exports b/src/ol/source/mapquestsource.exports
index d26cb03f25..cef1c0dcaf 100644
--- a/src/ol/source/mapquestsource.exports
+++ b/src/ol/source/mapquestsource.exports
@@ -1,2 +1 @@
-@exportSymbol ol.source.MapQuestOSM
-@exportSymbol ol.source.MapQuestOpenAerial
+@exportSymbol ol.source.MapQuest
diff --git a/src/ol/source/mapquestsource.js b/src/ol/source/mapquestsource.js
index 68e11dc08a..d32a12e927 100644
--- a/src/ol/source/mapquestsource.js
+++ b/src/ol/source/mapquestsource.js
@@ -1,6 +1,6 @@
-goog.provide('ol.source.MapQuestOSM');
-goog.provide('ol.source.MapQuestOpenAerial');
+goog.provide('ol.source.MapQuest');
 
+goog.require('goog.asserts');
 goog.require('ol.Attribution');
 goog.require('ol.source.OSM');
 goog.require('ol.source.XYZ');
@@ -13,63 +13,66 @@ goog.require('ol.source.XYZ');
  * @param {olx.source.MapQuestOptions=} opt_options MapQuest options.
  * @todo stability experimental
  */
-ol.source.MapQuestOSM = function(opt_options) {
+ol.source.MapQuest = function(opt_options) {
 
   var options = goog.isDef(opt_options) ? opt_options : {};
+  goog.asserts.assert(options.layer in ol.source.MapQuestConfig);
 
-  var attributions = [
-    new ol.Attribution({
-      html: 'Tiles Courtesy of ' +
-          '<a href="http://www.mapquest.com/" target="_blank">MapQuest</a>'
-    }),
-    ol.source.OSM.DATA_ATTRIBUTION
-  ];
+  var layerConfig = ol.source.MapQuestConfig[options.layer];
+
+  var url = 'http://otile{1-4}.mqcdn.com/tiles/1.0.0/' +
+      options.layer + '/{z}/{x}/{y}.jpg';
 
   goog.base(this, {
-    attributions: attributions,
+    attributions: layerConfig.attributions,
     crossOrigin: 'anonymous',
     logo: 'http://developer.mapquest.com/content/osm/mq_logo.png',
+    maxZoom: layerConfig.maxZoom,
     opaque: true,
-    maxZoom: 28,
     tileLoadFunction: options.tileLoadFunction,
-    url: 'http://otile{1-4}.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg'
+    url: url
   });
 
 };
-goog.inherits(ol.source.MapQuestOSM, ol.source.XYZ);
-
+goog.inherits(ol.source.MapQuest, ol.source.XYZ);
 
 
 /**
- * @constructor
- * @extends {ol.source.XYZ}
- * @param {olx.source.MapQuestOptions=} opt_options MapQuest options.
- * @todo stability experimental
+ * @const
+ * @type {ol.Attribution}
  */
-ol.source.MapQuestOpenAerial = function(opt_options) {
+ol.source.MapQuest.TILE_ATTRIBUTION = new ol.Attribution({
+  html: 'Tiles Courtesy of ' +
+      '<a href="http://www.mapquest.com/" target="_blank">MapQuest</a>'
+});
 
-  var options = goog.isDef(opt_options) ? opt_options : {};
 
-  var attributions = [
-    new ol.Attribution({
-      html: 'Tiles Courtesy of ' +
-          '<a href="http://www.mapquest.com/" target="_blank">MapQuest</a>'
-    }),
-    new ol.Attribution({
-      html: 'Portions Courtesy NASA/JPL-Caltech and ' +
-          'U.S. Depart. of Agriculture, Farm Service Agency'
-    })
-  ];
-
-  goog.base(this, {
-    attributions: attributions,
-    crossOrigin: 'anonymous',
-    logo: 'http://developer.mapquest.com/content/osm/mq_logo.png',
+/**
+ * @type {Object.<string, {maxZoom: number, attributions: (Array.<ol.Attribution>)}>}
+ */
+ol.source.MapQuestConfig = {
+  'osm': {
+    maxZoom: 28,
+    attributions: [
+      ol.source.MapQuest.TILE_ATTRIBUTION,
+      ol.source.OSM.DATA_ATTRIBUTION
+    ]
+  },
+  'sat': {
     maxZoom: 18,
-    opaque: true,
-    tileLoadFunction: options.tileLoadFunction,
-    url: 'http://oatile{1-4}.mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg'
-  });
-
+    attributions: [
+      ol.source.MapQuest.TILE_ATTRIBUTION,
+      new ol.Attribution({
+        html: 'Portions Courtesy NASA/JPL-Caltech and ' +
+            'U.S. Depart. of Agriculture, Farm Service Agency'
+      })
+    ]
+  },
+  'hyb': {
+    maxZoom: 18,
+    attributions: [
+      ol.source.MapQuest.TILE_ATTRIBUTION,
+      ol.source.OSM.DATA_ATTRIBUTION
+    ]
+  }
 };
-goog.inherits(ol.source.MapQuestOpenAerial, ol.source.XYZ);
diff --git a/src/ol/tilecoord.js b/src/ol/tilecoord.js
index 2cee206180..013cc5af2c 100644
--- a/src/ol/tilecoord.js
+++ b/src/ol/tilecoord.js
@@ -21,6 +21,7 @@ ol.QuadKeyCharCode = {
  * @param {number} z Zoom level.
  * @param {number} x X.
  * @param {number} y Y.
+ * @struct
  */
 ol.TileCoord = function(z, x, y) {
 
diff --git a/src/ol/tilegrid/xyztilegrid.js b/src/ol/tilegrid/xyztilegrid.js
index 239e282bc8..53c8a23f22 100644
--- a/src/ol/tilegrid/xyztilegrid.js
+++ b/src/ol/tilegrid/xyztilegrid.js
@@ -89,14 +89,7 @@ ol.tilegrid.XYZ.prototype.createTileCoordTransform = function(opt_options) {
             return null;
           }
         }
-        if (goog.isDef(opt_tileCoord)) {
-          opt_tileCoord.z = z;
-          opt_tileCoord.x = x;
-          opt_tileCoord.y = -y - 1;
-          return opt_tileCoord;
-        } else {
-          return new ol.TileCoord(z, x, -y - 1);
-        }
+        return ol.TileCoord.createOrUpdate(z, x, -y - 1, opt_tileCoord);
       });
 };
 
diff --git a/src/ol/tilegrid/zoomifytilegrid.js b/src/ol/tilegrid/zoomifytilegrid.js
index 115f1734c8..6bf221c8fd 100644
--- a/src/ol/tilegrid/zoomifytilegrid.js
+++ b/src/ol/tilegrid/zoomifytilegrid.js
@@ -74,13 +74,6 @@ ol.tilegrid.Zoomify.prototype.createTileCoordTransform = function(opt_options) {
             return null;
           }
         }
-        if (goog.isDef(opt_tileCoord)) {
-          opt_tileCoord.z = z;
-          opt_tileCoord.x = x;
-          opt_tileCoord.y = -y - 1;
-          return opt_tileCoord;
-        } else {
-          return new ol.TileCoord(z, x, -y - 1);
-        }
+        return ol.TileCoord.createOrUpdate(z, x, -y - 1, opt_tileCoord);
       });
 };
diff --git a/test/spec/ol/source/tilesource.test.js b/test/spec/ol/source/tilesource.test.js
index e643d8f4ea..c5895878a9 100644
--- a/test/spec/ol/source/tilesource.test.js
+++ b/test/spec/ol/source/tilesource.test.js
@@ -23,7 +23,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 3);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -45,7 +45,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 0);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -69,7 +69,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -94,7 +94,7 @@ describe('ol.source.Tile', function() {
       var grid = source.getTileGrid();
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -120,7 +120,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -143,7 +143,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }
@@ -168,7 +168,7 @@ describe('ol.source.Tile', function() {
       var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
 
       function getTileIfLoaded(z, x, y) {
-        var tile = source.getTile(z, x, y, null, null);
+        var tile = source.getTile(z, x, y);
         return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
             tile : null;
       }