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Home >> Mercedes Benz >> 2006 >> C55 >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Anti-Theft & Central Locking -- 203 Chassis >> Basic Knowledge >> Automatic locking, function - GF80.20-P-4009PP

Automatic locking, function - GF80.20-P-4009PP

MODEL 203.0/ 2/ 7 

Function prerequisites: 

Operating procedure 

The "Automatic locking" function locks the vehicle centrally, with the exception of the fuel filler flap, as soon as the vehicle speed exceeds approx. 15 km/h.

In this case, the EIS control unit (N73) transmits the "Lock" command to the controller area network bus class B (interior compartment) (CAN-B).

The left front door control unit (N69/1) actuates the left front door CL motor (M14/6), the right front door control unit (N69/2) right front door CL motor (M14/5), the left rear door control unit (N69/3) (only model 203.0/2) left rear door CL motor (M14/8) (only model 203.0/2) and the right rear door control unit (N69/4) (only model 203.0/2) right rear door CL motor (M14/9) (only model 203.0/2).

The rear SAM control module with fuse and relay module (N10/2) deactivates the trunk lid external operation switch (S88/8).

The vehicle can be unlocked again by opening the driver and passenger door from inside or with the interior central locking switch (N72/1s6) (up to 23.4.04) and the unlock CL interior switch (N72/1s16) (as of 24.4.04).

The vehicle remains also locked at speeds above the threshold. The initial state is reached again when the driver and passenger door are opened or with "Circuit 15 ON/OFF".

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  Front driver-side door control unit, location/task/design/function   GF72.29-P-4105PP
  Front passenger-side door control unit, location/task/design/function   GF72.29-P-4106PP
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