Mercedes-Benz 2012 B Class - Manual (Page 74)

Problems with the SmartKey
Problem Possible causes/consequences and M Solutions
You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the % or
& button.
If this does not work:
X Check the SmartKey battery and replace it if necessary
(
Y page 70).
X Unlock ( Y page 75) or lock ( Y page 75) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
X Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the % /
& button.
The SmartKey is faulty.
X Unlock ( Y page 75) or lock ( Y page 75) the vehicle using the
mechanical key.
X Have the SmartKey checked at a qualified specialist workshop.
You have lost a
SmartKey. X Have the SmartKey deactivated at a qualified specialist
workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well.
You have lost the
mechanical key. X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well.
72
SmartKey
Opening and closing