Locking/unlocking vehicle with interior switch, function - GF80.20-P-3009Q

Model 209.3/ 4 

Shown on model 209.3 

Fig 1: Locking/Unlocking Vehicle With Interior Switch Function

Courtesy of MERCEDES-BENZ USA

Function 

The signals from the interior central locking switch (N72/1s6) or the 'unlock' CL interior switch (N72/1s16) 'lock' CL interior switch (N72/1s26) are transmitted to the CAN-B bus (CAN-B) by the upper control panel control unit (N72/1).

The EIS control unit (N73) reads in these signals and actuate the locking and unlocking of the central locking (CL) depending on the:

• status of the central locking (CL)
• door status (signal of left door contact switch (S17/3) and right door contact switch (S17/4) from rear SAM control unit with fuse and relay module (N10/2) via CAN-B (CAN-B))

The fuel filler flap is not locked with this function

Possible situations are:

• Driver door open:

  Locking and unlocking enabled

• Passenger door open:

  No function enabled

• Driver and passenger door open:

  No function enabled

• After locking from outside with transmitter key:

  only locking enabled

• After unlocking from outside with transmitter key:

  Locking and unlocked enabled, if driver and passenger doors are open