Mercedes-Benz GL-Class: System self-test
The 42 indicator lamp illuminates when you:
• turn the SmartKey to position 1 or 2 in the
ignition lock
• on vehicles with KEYLESS-GO, press the
Start/Stop button once or twice
The 
indicator lamp goes out
again after approximately six seconds.
If the indicator lamp does not
illuminate or is lit continuously, the system is
malfunctioning. Have the BabySmart™
system checked at an authorized Mercedes-
Benz Center before transporting a child on
the front-passenger seat.
For further information, see "Problems with air bag deactivation system".
WARNING 
Do not place powered-on laptops, mobile
phones, electronic tags such as those used in
skipasses or similar electronic devices on the
front passenger seat. Signals from such
devices may interfere with the BabySmart™
air bag deactivation system. Such signal
interference may cause the
indicator lamp not to come on during self-test.
The + SRS indicator lamp and/or the
indicator lamp could be
continuously lit, indicating that the system is
not functioning. The front-passenger front air
bag could deploy inadvertently or fail to
deploy in an accident.
How the air bag deactivation systemworks
The BabySmart™ system is standard
equipment in Canada.
WARNING
Accident statistics show that children
secured in the rear seats are safer than
children secured in the front-passenge ...
Problems with air bag deactivation system
WARNING
If the indicator lamp
illuminates and remains illuminated when the weight of a
typical adult or someone larger than a small individual has been detected on the
passenger s ...
See also:
BAS (Brake Assist System)
Observe the "Important safety notes"
section.
BAS operates in emergency braking
situations. If you depress the brake pedal
quickly, BAS automatically boosts the braking
force, thus s ...
Radio(s)
Radio with CD, DVD, and USB Port
: Press to turn the system on and
off. Turn to increase or decrease the volume.
BAND: Press to choose between FM, AM, or XM™, if equipped.
: Select radio st ...
Roadside Assistance Program (U.S. and Canada)
For U.S.-purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438).
For Canadian-purchased vehicles, call 1-800-268-6800.
Service is available 24 hours a day, 365 days a year.
...
