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Tailgate closing, function - GF80.20-P-2001TA

MODEL 211.2 with CODE (890) Automatic tailgate 

Fig 1: Tailgate Closing Function Chart
G07271226Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Requirements 

The tailgate closing switch (S62/36)  allows the tailgate to be closed hydraulically by pressing once Actuating the tailgate closing switch (S62/36)  more than once stops the closing motion or continues it.

IMPORTANT If the vehicle is equipped with keyless go, code 889 the tailgate can be closed automatically with the tailgate closing button (S62/35)  or closed and locked automatically with the keyless go trunk lid button (S62/21) 

Operating procedure 

Actuation of the tailgate closing switch (S62/36)  is read in by the tailgate control module (N111)  and relayed via the CAN interior compartment bus to the tailgate closing control module (N121/1)  The tailgate closing control module (N121/1)  starts the tailgate hydraulic pump (M51/1). 

The hydraulic cylinder is filled with oil and closes the tailgate over the multiple joint hinge The trunk lid/tailgate opening angle recognition sensor (B24/16)  allows the tailgate closing control module (N121/1)  to check the hydraulic operation and end switch-off of the tailgate hydraulic pump (M51/1). 

When the trunk lid/tailgate opening angle recognition sensor (B24/16)  reaches the defined end switch-off angle, the tailgate closing control module (N121/1)  switches off the tailgate hydraulic pump (M51/1) 

Manual closing 

If necessary, manual actuation of the tailgate is possible, however, requires increased force, because it is also necessary to move the hydraulic mechanism. The trunk lid opening angle detection sensor (B24/16)  does not require any recalibration after a manual intervention. The open state of the tailgate is indicated by an LED in the tailgate remote opening switch (S15) 

IMPORTANT The end switch-off of the tailgate hydraulic pump (M51/1)  is selected so that after the hydraulic mechanism is switched off the tailgate locks automatically with its own weight. The complete tailgate closing is accomplished by the power locking feature.

Special case for automatic extending main cargo floor, code 943 

If the vehicle is equipped with an automatic extending main cargo floor, code 943  the state of the cargo floor (extended/retracted) has an effect on the operation of the automatic tailgate closing feature  . If the cargo floor is not completely retracted  (status signal from cargo floor control module (N130)  via CAN interior compartment bus and a request to close the tailgate is present at the tailgate closing control module (N121/1)  , the latter sends a warning signal  to the tailgate control module (N111)  via the CAN interior compartment bus which causes the cargo floor switch (S150)  to flash  This warning signal remains set as long as the request "Close tailgate" is present on the tailgate closing control module (N121/1)  The cargo floor switch (S150)  flashes for a maximum of 25 s under the control of the tailgate control module (N111)  It is then necessary for the tailgate control module (N111)  to send a new warning signal via the CAN interior compartment bus.

Tailgate closing control module, location/purpose GF80.20-P-1101TA 
Tailgate hydraulic pump, location/purpose GF80.20-P-1104TA 
Opening angle recognition sensor, location/purpose GF80.20-P-1103TA 
Open tailgate switch, location/purpose/design GF80.20-P-1107TA
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