Mercedes-Benz E-Class 2010 Owner's Manual page 72

Problems with the key
Problem
You cannot lock/
unlock the vehicle
using the key.
You can no longer
lock/unlock the vehi-
cle using KEYLESS-GO.
You have lost a key.
You have lost the emer-
gency key element.
Possible causes/consequences and M Solutions
The key battery is discharged or nearly discharged.
Point the tip of the key at the driver's door handle from a dis-
X
tance of approximately 50 cm and try to unlock or lock the
vehicle again.
If this does not work:
Lock or unlock the vehicle using the emergency key element
X
( page 67).
Y
Check the key battery and replace it if necessary (
X
The key is faulty.
Lock the vehicle as described in the "Locking the vehicle (emer-
X
gency key element)" section (
emergency key element (
Have the key checked at a qualified specialist workshop.
X
KEYLESS-GO is in standby mode because the vehicle has not been
unlocked for an extended period.
Pull the door handle and then turn the key to position 2 in the
X
ignition lock.
There is a fault with KEYLESS-GO.
Lock/unlock the vehicle using the remote control function of
X
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button.
Have the key checked at a qualified specialist workshop.
X
There is interference from a powerful source of radio waves.
Lock/unlock the vehicle using the remote control function of
X
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button.
Have the key cancelled at a Mercedes-Benz Service Centre.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
X
page 71) or unlock it using the
Y
page 67).
Y
Key
69
page 68).
Y
Z