Starting procedure with the SmartKey
To start the engine using the SmartKey
instead of KEYLESS-GO, pull the Start/Stop button out of the ignition lock.
To start a gasoline engine: turn the
SmartKey to position 3 in the ignition lock
and release it as soon as the
engine is running.
To start a diesel engine: turn the
SmartKey to position 2 in the ignition lock.
The 
preglow indicator lamp in the
instrument cluster lights up.
When the preglow indicator lamp
goes out, turn the SmartKey to position 3
and release it as soon as the
engine is running.
You can start the engine without preglow
if the engine is warm.
See also:
Belt height adjustment
You can adjust the seat belt height on the
driver's seat and the front-passenger seat.
Adjust the height so that the upper part of the
seat belt is routed across the center of your
shoulder.
&# ...
Rear seat head restraints
WARNING
For safety reasons, always drive with the rear
head restraints in the upright position when
the rear seats are occupied.
Keep the area around head restraints clear of
articles (e.g. ...
Notes on technical data
The data stated here
specifically refers to
a vehicle with standard equipment. Consult
an authorized Mercedes-Benz Center for
the data for all vehicle variants and trim
levels. ...