Mercedes-Benz 2004 C-Class Coupe Operator's Manual page 84

Controls in detail
Locking and unlocking
!
If you can no longer lock or unlock the
vehicle with the SmartKey, then the
batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the Smart-
Key and replace them if necessary
( page 290).
Use the mechanical key to unlock
the doors ( page 288). Lock the
vehicle using the mechanical key
( page 289).
Have the vehicle battery and the
battery connections checked by an
authorized Mercedes-Center.
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz Cen-
ter.
84
Checking the batteries
Press button ‹ or Œ.
Battery check lamp 4 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.
!
If battery check lamp 4 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries ( page 290).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
i
If the batteries are checked within sig-
nal range of the vehicle, pressing
the ‹ or Œ button will lock or
unlock the vehicle accordingly.
Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.