Mercedes-Benz 2005 M-Class Operator's Manual page 264

Practical hints
What to do if ...
Problem
1
The red SRS indicator lamp lights
up while driving.
Warning!
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Light Truck Center immedi-
ately to have the system checked, otherwise
the SRS may not be activated when needed
in an accident, which could result in serious
or fatal injury, or it might deploy unexpect-
edly and unnecessarily which could result in
an accident/or injury to you or to others.
262
Possible cause
There is a malfunction in the restraint sys-
tems. The airbags or emergency tensioning
device (ETDs) could deploy unexpectedly or
fail to activate in an accident.
G
Suggested solution
Drive with added caution to the near-
est authorized Mercedes-Benz Light
Truck Center.