Date registered: Sep 2006
Vehicle: 2004 CLK 240 Coupe
Location: Norfolk. UK
Mentioned: 11 Post(s)
Quoted: 383 Post(s)
This may clarify how the remote key should operate.
When you press lock on your remote key, a radio signal is received in the antenna in the A pillar and passed to the receiver in N10 - the All Activity Module (AAM). The authorisation code is checked, and if valid the following are done electrically:
a) all doors & tailgate that are closed are locked.
b) fuel filler flap is locked.
c) ATA anti theft alarm is activated.
d) when a) & b) are completed, as of 12/99, all turn signal lights will flash 3 times.
The signal path & validation are identical to the above, and is accomplished in 2 stages.
If the car was previously locked as above, one press of the unlock button will unlock the driver's door and the fuel filler flap. The front interior lamp will light, and the ATA will be inhibited.
When the unlock button is pressed again, the remaining doors and tailgate will unlock. As of 1/3/98, when the unlock button is pressed twice immediately in sequence, the AAM will unlock all doors, the fuel filler flap and the tailgate simultaneously.
As of 12/99, confirmation of unlocking is by momentarily flashing of all turn signal lamps.