Mercedes-Benz S-Class 2013 Owner's Manual page 100

Problems with the key
Problem
You can no longer lock
or unlock the vehicle
using the key.
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.
Possible causes/consequences and M M Solutions
The key battery is discharged or nearly discharged.
Check the key battery (
X
( page 96).
Y
If this does not work:
Unlock ( page 101) or lock (
X
Y
emergency key element.
There is interference from a powerful source of radio waves.
Unlock ( page 101) or lock (
X
Y
emergency key element.
The key is faulty.
Unlock ( page 101) or lock (
X
Y
emergency key element.
Have the key checked at a qualified specialist workshop.
X
The key battery is discharged or nearly discharged.
Check the key battery (
X
( page 96).
Y
If this does not work:
Unlock ( page 101) or lock (
X
Y
emergency key element.
There is interference from a powerful source of radio waves.
Unlock ( page 101) or lock (
X
Y
emergency key element.
There is a fault with KEYLESS-GO.
Lock/unlock the vehicle using the remote control function of
X
the key.
Have the vehicle and key checked at a qualified specialist work-
X
shop.
If the vehicle can also not be locked/unlocked using the remote
control function:
Unlock ( page 101) or lock (
X
Y
emergency key element.
Have the vehicle and key checked at a qualified specialist work-
X
shop.
page 95) and replace it if necessary
Y
page 101) the vehicle using the
Y
page 101) the vehicle using the
Y
page 101) the vehicle using the
Y
page 95) and replace it if necessary
Y
page 101) the vehicle using the
Y
page 101) the vehicle using the
Y
page 101) the vehicle using the
Y
Key
97
Z