I have a E320 Wagon that the driver side marker light is out. Can someone tell me how to get to it and change the ligt bulb. I looked at the wheel well, it is cove. Please give me directions. Thanks.

You don't mention the year, but I think they're all pretty similar. There's a flap in the wheel well to get at the lamp. Reach in and unclip the lamp assembly and push it out the hole.

Your owner's manual has this information.