Mercedes-Benz 2010 M-Class Operator's Manual page 342

Towing the vehicle
340
Vehicles with AMG Sport Package
X
Press mark on cover : as indicated by the
arrow.
X
Lift cover : off to reveal the threaded hole
for the towing eye bolt.
Removing cover in rear bumper
G
Warning!
In order to avoid possible serious burns or
injury, use extreme caution when removing
the rear cover, because the rear exhaust pipe
is extremely hot.
Vehicles with Sport Package
Vehicles with AMG Sport Package
X
Press mark on cover : as indicated by the
arrow.
X
Vehicles with Sport Package: Pry
cover : with a flat, blunt object as a lever.
X
Vehicles with AMG Sport Package: Press
mark on cover : as indicated by the arrow.
X
Lift cover : off to reveal the threaded hole
for the towing eye bolt.