Transmitter key, component description - GF80.57-P-6010MCU

MODEL 451.3 /4

Shown on transmitter key for model 451.3

Fig 1: Identifying Transmitter Key Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Design

The transmitter key consists of a key bit and key handle. The remote control of the central locking with radio transmitter, a computer chip, a transponder, as well as battery button cell, are integrated into the key handle. The following controls are also integrated:

Lock button
Release button
Rear-end door upper section open button or folding top open button
Panic alarm button

Central locking

Pressing lock button once:

Driver door, front passenger door and fuel filler flap are locked.

Pressing release button once:

Driver door, front passenger door and fuel filler flap are unlocked.

Press rear-end door open button and hold down for 2 s:

Rear-end door upper section is unlocked.

Press folding top open button and hold down for 2 s:

Folding top opens to rear end position.

Panic alarm

Actuating panic alarm button.

The panic alarm is triggered when actuated for t = 2 s.
The panic alarm is terminated when reactuated for t = 0.5 s.

Drive authorization system

After inserting the transmitter key into the ignition/starter switch (S2/1) data is exchanged for checking the drive authorization when circuit 15 is on.

Battery check

If the battery is weak, the hazard warning system is actuated 9 times in rapid sequence when the lock button is pressed.

It is then possible to actuate the transmitter key approx. another 100 times.