System self-test
After you have switched on the ignition, the system carries out a self-diagnosis.
WARNING
A malfunction in the system has been
detected if one of the following conditions
occurs:
- the indicator lamp in the SOS button does not light up during the system selfdiagnosis.
- the indicator lamp in the 
Roadside
Assistance button does not light up during
the system self-diagnosis.
- The indicator lamp in the 
information
button does not light up during selfdiagnosis
of the system.
- the indicator lamp in the SOS button,
Roadside Assistance button or
information button continues to be lit red
after the system self-diagnosis.
- The Tele Aid Inoperative or Tele Aid Not Activated message appears in the multifunction display after the system selftest.
If a malfunction is indicated as outlined above, the system may not operate as expected. In the event of an emergency, assistance must be summoned by other means.
Have the system checked at the nearest authorized Mercedes-Benz Center or contact the following service hotlines:
- USA: Mercedes-Benz Customer Assistance Center under 1-800-FOR-MERCedes(1-800-367-6372) or 1-888-990-9007
- Canada: Customer Service at 1-888-923-83
See also:
Setting the center vents in the rear
compartment
1 Rear-compartment air vent, left
2 Rear-compartment air vent, right
3 Rear-compartment air vent thumbwheel, right
4 Rear control panel for automatic climate control
5 Rear-compartment a ...
Numerous stowage facilities, high degree of variability and
temperature-controlled cup holder
Numerous, easily accessible stowage facilities in the M-Class can accommodate
bottles, mugs, keys, coins and much more. Each of the four doors can also easily
accommodate a large 1-litre bottle.
...
General notes
If the vehicle can no longer be locked or unlocked with the SmartKey, use the
mechanical key.
If you use the mechanical key to unlock and open the driver's door, the anti-theft
alarm system w ...