They are completely replace the old mirrors, and 't effect any feature or functionality e.i electric folding, dimming which will all keep the sameFeatures:with Heating, glass adjustment, folding, turn signal, floor light,Black Cover CapCompatible with the following vehicles:for W221 2010-2013 S300 S350 S400 S500 S600 S63 S65 Installation:Direct replacement, modification highly recommended-Instruction not includedRequired basic knowledge to remove the old mirrors and after that install new setLocation:RightColour:BlackMaterial:ABSPackage Contents:1 x Side Rear View Mirror AssemblyOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.