Mercedes-Benz 2011 R-Class Operator's Manual page 319

Engine emergency off
If the engine cannot be switched off as
described, observe the following procedure:
X
Take the fuse allocation chart out of the
vehicle tool kit ( Y page 294).
X
Open the fuse box in the engine
compartment ( Y page 316).
X
Remove fuse 120. The installation location
of the fuse is described in the fuse
allocation chart.
Fuses
317
Z