Mercedes Benz 2009 M-Class User Manual

1 Front side impact air bag
2 Window curtain air bag
3 Rear side impact air bag*

The side impact air bags and window 
curtain air bags are deployed:

앫

on the impacted side of the vehicle

앫

in impacts exceeding a preset deploy-
ment threshold

앫

independently of the front air bags

In addition, the window curtain air bags

2 

are deployed in certain vehicle rollovers.

The front passenger side impact air bag 
will not deploy if the OCS senses that the 
front passenger seat is empty and the front 
passenger seat belt is not fastened (latch 
plate is not inserted into the buckle). With 
an empty front passenger seat and the 
seat belt fastened (latch plate properly in-
serted into buckle) the front passenger 
side impact air bag will deploy indepen-
dently of the empty seat.

The side impact air bags and window cur-
tain air bags are not deployed in impacts 
which do not exceed the system’s deploy-
ment threshold.

G

The pressure sensors for side impact air bag 

control are located in the doors. Do not 

modify any components of the doors or door 

trim panels including, for example, the addi-

tion of door speakers.

Improper repair work on the doors or the 

modification or addition of components to 

the doors create a risk of rendering the 

side impact air bags inoperative or causing 

unintended air bag deployment. Work on the 

doors must therefore only be performed by 

qualified technicians. Contact an authorized 

Mercedes-Benz Light Truck Center.