Roof carrier

Important safety notes

WARNING Only use carriers when the crossbars have 
Only use carriers when the crossbars have been completely mounted. The left and right roof rails are only stabilized by means of the crossbars mounted.
Follow the manufacturer's installation instructions. Otherwise, an improperly attached carrier or its load could become detached from the vehicle.
Do not exceed the maximum roof load of 198 lb (90 kg).
Take into consideration that when the roof is loaded, the handling characteristics are different from those when operating the vehicle without the roof loaded.

only use roof carriers that have been tested Mercedes-Benz recommends that you only use roof carriers that have been tested and approved for Mercedes-Benz vehicles.

This helps to prevent damage to the vehicle.

Position the load on the roof carrier in such a way that the vehicle will not sustain damage even when it is in motion.

Depending on the vehicle equipment, ensure that when the roof carrier is installed you can:

raise the sliding sunroof fully
open the tailgate fully

See also:

Safety
The R-Class received a Good overall score — the highest rating possible — in the Insurance Institute for Highway Safety's frontal-offset and side-impact crash tests. It hadn't yet undergone IIHS' ...

Maximum tire pressure
WARNING Never exceed the maximum tire inflation pressure. Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adver ...

Securing cargo
Plastic hooks (Sedan) On vehicles without a through-loading feature in the rear bench seat, six plastic hooks are installed to the trunk floor. Cargo tie-down rings Observe the following note ...