change key battery MERCEDES-BENZ C-Class 2000 W202 Owner's Manual

Locking and Unlocking

Unlocking:
Press transmit button . All turn signal lamps blink once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of unlocking methods (see below):
Selective unlocking mode:
Press transmit button once to unlock driver's door and fuel filler flap.
Press transmit button twice to unlock doors, fuel filler flap, and trunk.
Global unlocking mode:
Press transmit button once to unlock doors, fuel filler flap, and trunk.

Notes:
If the trunk was previously locked separately, it will remain locked (see Index). The presently active
unlocking mode (selective or global) can only be determined by unlocking the vehicle with the
remote control (see below for changing mode). The vehicle is automatically locked again, if within 40
seconds of unlocking with the remote control, neither door or trunk is opened, the electronic key is
not inserted in the steering lock, or the central locking switch is not activated.


Locking:
Press transmit buttononce. All turn signal lamps blink three times to indicate that the vehicle is
locked


Note:
If the vehicle cannot be locked or unlocked by pressing the transmit button, then it may be necessary
to change the batteries in the transmitter (if ok, battery check lamp in transmitter will light briefly
when
transmitting) or to synchronize the system, see Remote Control in Index.

Choosing Global or Selective Mode on Remote Control
Press and hold transmit buttons and simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times indicating the completed mode change.

Opening the Trunk

A minimum height clearance of 5.9 ft ( 1.8 m) is required to open the trunk lid.
Press transmit button until trunk lid is open.

Important !
Do not place remote control in trunk since trunk is locked again when closing the lid.

Note:
If the trunk was previously locked separately, it will remain locked (see Index).

Opening and Closing Windows and Sliding/Pop-Up Roof from Outside
Aim transmitter eye (5) of remote control at door receivers (6 or 7).
To open:
Continue to press transmit button after unlocking car
The windows and sliding/pop-up roof begin to open after approx. 1 second. To interrupt opening
procedure, release button.
To close:
Continue to press transmit button after locking car

The windows and sliding/pop-up roof begin to close after approx. 1 second. To interrupt closing
procedure, release button.

Warning !
Never operate the windows or sliding/pop-up roof if there is the possibility of anyone being
harmed by the opening or closing procedure.
In case the procedure causes potential danger, the procedure can be immediately halted by
releasing the remote control button. To reverse direction of movement press for opening
or for closing.

Note:
If the windows and sliding/ pop-up roof cannot be operated automatically by pressing the transmit
button of the remote control then it may be necessary to change the batteries in the transmitter
(if ok, battery check lamp in transmitter will light briefly when transmitting), or to synchronize the
electronic main key, see Synchronizing remote Control in Index.

Electronic Main Key Remote Control

1. Transmit buttons
2. Lamp for battery check and function control



Checking Batteries:
If one of the transmit buttons is pressed, the function control lamp briefly illuminates - indicating that the batteries
are in order.Change batteries if the function control lamp does not light up briefly.







Changing Batteries:
Move lock (1) in direction of right arrow and slide out mechanical key (2, left arrow). Insert mechanical key (2) in
side opening (3) to open latch. Press briefly (do not use key as lever) to release battery compartment.
Remove mechanical key.
Lift battery compartment (4) slightly in direction of arrow (5) and remove in direction of arrow (6). Change batteries
(7), inserting new ones under contact spring (8) with plus (+) side facing up. Return battery compartment into housing
until locked in place.

Important !
Batteries contain materials that can harm the environment if disposed of improperly. Recycling of batteries is the
preferred method of disposal. For disposal, please follow manufacturer's recommendation on battery package.
Replacement battery: Lithium, type CR 2025 or equivalent.

Synchronizing Remote Control:
The remote control may have to be resynchronized, if the vehicle cannot be locked or unlocked. To synchronize
insert electronic key in steering lock. The remote control should once again be operational.