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Remove/install left trailer hitch longitudinal member - AR31.30-P-0005EW

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MODEL 212.0/2 with CODE 550 (Trailer coupling) 

Fig 1: Left Trailer Hitch Longitudinal Member Remove/Install Components (1 Of 2)
G09976048Courtesy of MERCEDES-BENZ USA
Fig 2: Left Trailer Hitch Longitudinal Member Remove/Install Components (2 Of 2)
G09976049Courtesy of MERCEDES-BENZ USA
IMPORTANT Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
IMPORTANT Notes on installing a trailer hitch   AH31.10-P-1000-02CW
REMOVING Remove     
1 Remove rear bumper   AR88.20-P-2200EW
2 Remove cover of left side panel in trunk or cargo area    
3.1 Remove vehicle tool kit (7) except CODE 690 (Emergency spare tire (minispare)) or except CODE R66 (Run-flat tire)  
3.2 Remove spare tire with CODE 690 (Emergency spare tire (minispare)) or with CODE R66 (Run-flat tire)  
4 Remove crossmember of trailer hitch (1)   AR31.30-P-0007EW 
5 Unscrew screws/bolts (5) on left longitudinal member reinforcement (2)    
6 Pull out and remove left longitudinal member reinforcement (2) with seal (4) from the vehicle's left longitudinal member    
7 Remove seal (4) from left longitudinal member reinforcement (2) IMPORTANT Check seal (4) for damage and replace, if necessary. Pay attention to installation position.  
INSTALLING Install     
8 Recut thread for bolts (5) of left longitudinal member reinforcement (2) IMPORTANT When reusing left longitudinal member reinforcement (2).  
9 Push seal (4) over left longitudinal member reinforcement (2) IMPORTANT Check seal (4) is correctly positioned. The upper side of the seal (4) is marked with an arrow. Moisten the inside of the seal (4) with lubricant.  
10 Push left longitudinal member reinforcement (2) into vehicle's left longitudinal member    
11 Position left longitudinal member reinforcement (2) on vehicle longitudinal member and screw in bolts (5) with shims up to stop IMPORTANT It must be possible to move the left longitudinal member reinforcement (2) for aligning the trailer hitch. Replace bolts (5).  
12 Tighten bolts (5) on left longitudinal member reinforcement (2) TORQUE SPECIFICATION Bolt, longitudinal member reinforcement to frame side member *BA31.11-P-1003-01J 
13 Install crossmember for trailer hitch (1)   AR31.30-P-0007EW 
14.1 Install on-board tool kit box (7) except CODE 690 (Emergency spare tire (minispare)) or except CODE R66 (Run-flat tire)  
14.2 Install spare tire with CODE 690 (Emergency spare tire (minispare)) or with CODE R66 (Run-flat tire)  
15 Install rear bumper   AR88.20-P-2200EW
16 Install cover of left side panel into trunk or cargo area    
INSPECT Check     
17 Conduct function check on mechanical swing-away trailer hitch   AR31.19-P-1450EW 
TRAILER HITCH MECHANISM

Number Designation MODEL 212
BA31.11-P-1003-01J Bolt, longitudinal member reinforcement to frame side member Nm 85