WARNING
Only have a trailer tow hitch retrofitted at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz recommends that you use an authorized Mercedes-Benz Center for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

If you have a trailer tow hitch retrofitted, changes to the cooling system and drive train may be necessary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted, observe the anchorage points on the chassis frame.

Anchorage points for the trailer tow hitch (example)

1 Anchorage points
2 Rear axle center line