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Home >> Mercedes Benz >> 2021 >> GT 53 AMG >> Repair and Diagnosis >> Body & Frame >> Windows >> Doors -- 290 Chassis >> Testing & Repair >> Remove/Install Electric Liftgate Drive Unit - AR72.29-P-5590FRX

Remove/Install Electric Liftgate Drive Unit - AR72.29-P-5590FRX

Model 290 

Fig 1: Electric Liftgate Drive Unit Components Location - Model 290
G16556019WARNINGREMOVINGINSTALLINGINSTALLATION IMPORTANTSPECIAL TOOLNOTESINSTALLATION IMPORTANTNOTESINSTALLATION IMPORTANTREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy of MERCEDES-BENZ USA
WARNING Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. No parts of the body or limbs should be within the operating area when the components are moving. AS00.00-Z-0011-01A
Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
  Notes on safety-relevant components   AH00.00-Z-0019-01A
REMOVINGINSTALLING Remove/install     
1 Remove top liftgate trim.   AR72.20-P-6631FRX 
2 Switch off ignition and store transmitter key outside of transmission range (min. 2 m).    
3 Disconnect corresponding electrical connector (2) from liftgate control unit (N121/1).    
4 Expose electric line.    
5 Release grommet (3) from liftgate (1). INSTALLATION IMPORTANT Ensure grommet (3) is seated correctly.  
6 Guide electric line out of the duct.    
7 Secure liftgate (1) with support. SPECIAL TOOL Support Fig 2
8 Lift retainer on bottom ball head (5) with a suitable screwdriver and remove liftgate control drive unit (M51/4, M51/5) from the D-pillar. NOTES
Do not remove retainer from bottom ball head (5).
Otherwise, the preload of the bottom retainer may be lost.
 
    INSTALLATION IMPORTANT Clip in liftgate control drive unit (M51/4, M51/5) with installed bottom retainer on ball head (5).  
9 Lift retainer on top ball head (4) with a suitable screwdriver, take liftgate control drive unit (M51/4, M51/5) off the liftgate (1) and remove. NOTES
Do not remove retainer from top ball head (4).
Otherwise, the preload of the top retainer may be lost.
 
    INSTALLATION IMPORTANT Clip in liftgate control drive unit (M51/4, M51/5) with installed top retainer to ball head (4).  
10 Install in the reverse order.    
11 Normalize liftgate control drive unit (M51/4, M51/5) with vehicle diagnosis system. When installing new liftgate control drive unit (M51/4, M51/5).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06FR
Fig 2: Identifying Support (170 589 04 63 00)
G16556020Courtesy of MERCEDES-BENZ USA