Mercedes-Benz E 320 Wagon 1999 ASR - Manual (Page 40)

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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
lights up briefly- 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 mechanical 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).