Mercedes-Benz 2008 C 300 4MATIC Sport, Operator'S Manual

Page: 87 / 406

Problems with the SmartKey
Problem
Possible causes/consequences and M M Solutions
You can no longer lock
or unlock the vehicle
using the SmartKey.
The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (
Y
page 84) and replace it if nec-
essary (
Y
page 84).
If this does not work:
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
The SmartKey is faulty.
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
X
Have the SmartKey checked at a qualified specialist workshop.
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.
KEYLESS-GO was deactivated.
X
Reactivate KEYLESS-GO (
Y
page 81).
The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (
Y
page 84) and replace it if nec-
essary (
Y
page 84).
If this does not work:
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of
the SmartKey.
X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
X
Unlock (
Y
page 88) or lock (
Y
page 89) the vehicle using the
mechanical key.
X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.
SmartKey
85
Opening
and
closing
Z