Problems With The Smartkey - Mercedes-Benz C-Class Operator's Manual

Problems with the SmartKey

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