Checking the battery

•► Press the
or
button.
The battery is working properly if battery check lamp 1 lights up briefly If battery check lamp 1 does not light up briefly during the test, the battery is discharged.
•► Changing the battery
You can obtain the battery at a qualified specialist workshop.
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the
or
button locks or
unlocks the vehicle.
See also:
Checking the coolant level
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
Turn the SmartKey to position
2 in the ignition lock.
On vehicles with KEYLESS-GO, press th ...
BAS PLUS (Brake Assist System Plus)
BAS PLUS is only available in vehicles
equipped with DISTRONIC PLUS.
Observe the "Important safety
notes"
section.
At speeds above approximately
20 mph (30 km/h), BAS PLUS assists ...
Important safety notes
WARNING
Only use roof racks approved by Mercedes-
Benz for your vehicle model to avoid damage
to the vehicle.
Follow the manufacturer's installation
instructions. Otherwise, an improperly ...
