Unlocking the driver's door (mechanical key)
If the vehicle can no longer be 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 will be triggered.
- Take the mechanical key out of the
SmartKey.
- Insert the mechanical key into the lock of
the driver's door as far as it will go.

- Turn the mechanical key counterclockwise
to position 1.
The door is unlocked.
- Turn the mechanical key back and remove
it.
- Insert the mechanical key into the
SmartKey.
See also:
Diesel Delight
Despite its hefty, 5,040-pound curb weight, the ML350 Bluetec moves out well,
with power in reserve at midrange speeds. The diesel's power characteristics are
well-suited to towing, and the SUV is ...
High-beam headlamps (halogen headlamps)
Switch off the lights.
Open the hood.
Remove the headlamp cover ().
Left-hand headlamp: detach the washer fluid reservoir ().
Turn housing cover 1 counter-clockwise and pull it out.
Pre ...
Roadside Assistance button
Open the stowage compartment under the
armrest.
Press and hold Roadside Assistance
button 1 for more than two seconds.
This initiates a call to the Mercedes-Benz
Customer Assistance Center ...
