Open trunk lid manually function - GF80.20-P-3013B

MODELS 215, 220 with CODE (881b) Remote trunk locking (RTL) 

Fig 1: Identifying Trunk Lid Release Switch And Trunk Lid Lock Switch

Operating procedure 

When the lock cylinder in the trunk lid lock is in position 1, the lock cylinder is pushed in  and the trunk lid release switch (S15/1)  is activated. Operation of the switch is detected by the pneumatic control module (combined) (A37)  . If the vehicle is centrally unlocked, then the pneumatic control module (combined) (A37) releases the trunk lid and then starts the hydraulic pump RTL (M51)  .

Thehydraulic ram  is then charged with fluid by the hydraulic pump RTL (M51)  and opens the trunk lid by way of the multiple-jointed hinge to the end position. The trunk lid reaching the specified limit stop position and the uniform opening operation of the trunk lid are registered by the trunk lid opening angle detection sensor (B24/16)  and sent to the pneumatic control module (combined) (A37).

When the trunk lid opening angle detection sensor reaches the specified limit stop position, the pneumatic control module (combined) (A37) switches off the hydraulic pump RTL (M51) and the trunk lid stops in the open position.

Operating instructions 

If the trunk lid release switch (S15/1)  is operated several times the hydraulic trunk lid opening operation is stopped at the position at that time or set forth. The stopping or continuation of the hydraulic opening operation can also be conducted with the transmitter key (A8/1) or the remote trunk lid release switch (S20/1s6).

Manual  operation of the trunk lid is possible in an emergency, but necessitates greater physical effort as the hydraulic system also has to be moved. The trunk lid opening angle detection sensor (B24/16) does not require any recalibration after a manual intervention.

Safety mechanism 

With the aid of the trunk lid opening angle detection sensor (B24/16) the pneumatic control module (combined) (A37) can also initiate an emergency-stop function  . In the event that the trunk lid encounters an obstacle, or a manual intervention takes place on the trunk lid, the trunk lid opening angle detection sensor (B24/16) registers a change in speed of the trunk lid. The pneumatic control module (combined) (A37) then immediately switches off the hydraulic pump RTL (M51). The trunk lid is then held at the position that it was in.

When the trunk lid is open this is displayed by an illuminated red LED in the remote trunk lid release switch (S20/1s6).