Mercedes-Benz 2003 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 key, then either the
batteries in the SmartKey are dis-
charged or the key is malfunctioning or
the vehicle battery is drained.
Check the batteries in the key and
replace them if necessary
( page 276).
or
Check the vehicle battery
( page 294).
or
Use the mechanical key to unlock
the doors ( page 274) as required.
Lock the vehicle using the mechan-
ical key ( page 275).
If the key is malfunctioning, contact an
authorized Mercedes-Benz Center.
84
Checking the batteries
Press button ‹ or Œ .
Battery check lamp 4 lights up briefly
to indicate that the key batteries are in
order.
!
If battery check lamp 4 does not light
up briefly during check, then the key
batteries are discharged.
Replace the batteries ( page 276).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
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.