Mercedes-Benz S 500 Operator's Manual page 30

3 Receiver next to trunk lock
Locking:
Aim transmitter eye (2) at a receiver
(3) and press transmit button (1).
Distance to receiver max. 20 ft (6 m).
The red indicator lamp on the receiver
should blink. It stops blinking after
approximately 3 seconds when the
vehicle is properly locked.
Notes:
If a door or the trunk is not properly
closed after you attempt to lock the
vehicle by remote control, the red
indicator lamps will continue to blink
(max. 10 seconds). Open the door or
trunk lid, close it properly, and' lock
the car again.
If the vehicle cannot be locked or
unlocked by pressing the transmit
button (1), then it may be necessary to
change the batteries in the transmitter
(if ok, battery indicator lamp in
transmitter will light when
transmitting) or to synchronize the
system, see Testing Infrared Remote
Control in Index.
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