This mount is similar to our previous design, except Mercedes had to make it interesting with an oval door mount. We 3D printed a base that gets sandwiched in between the flip mount and seals against the door like the factory mount, which gives a smooth clean look. The base is made from PETG, then sanded, primed and painted. We also incorporated drain slots in the base for water.
Find your back spacing - the 4th picture shows an example
Hold a straight edge across the tire and measure down to the wheel hub. The flip mount ranges will give your tire 1/2" to 1" clearance to the door. Example, if your backspace measures 7" and you choose the 6.5-7" length, then your tire will be 1/2" from the door at the tightest point.
Common backspacing (these can vary)
6.5"-7" - Stock wheel/tires
7"-7.5" - A little wider, up to 285 wide tires
7.5"-8" - A lot wider, up to 305 or 12.5" tires
Add a wheel spacer - We now have 1/4" wheel spacers, so you can order a shorter mount and space out as necessary. The backup radar can give an error message if it "sees" the rear tire, so keeping it close to the door is helpful.
Includes 5 OEM wheel bolts and an external Torx bit to install mount.