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Remove/Install Trailer Hitch - AR31.10-P-8000MFA

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Model 118.3/6, 177.0/1, 243.7, 247 with code 550 (Trailer coupling) 

G16049840Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. AS00.00-Z-0010-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
Notice  Notes on installing a trailer hitch   AH31.10-P-1000-02CW 
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
1 Remove rear bumper. Model 243.7 with code 550 (Trailer coupling) AR88.20-P-2200EQA
    Model 118.3/6, 177.0/1, 247 with code 550 (Trailer coupling) AR88.20-P-2200MFA
2 Unscrew bolts (6) and remove trailer socket (X58, X58x1).    
3 Release and disconnect the electrical connection (8).    
4 Remove electrical wiring harness from trailer hitch (1) and ball neck.    
5 Unscrew bolts (4) and remove trailer hitch (1). IMPORTANT Aid of helper required.
TORQUE SPECIFICATION Bolt/nut, trailer hitch to longitudinal member reinforcement
*BA31.11-P-1001-01K 
6 Install in the reverse order.    
7 Check function of trailer hitch (1) with electrical release.   AR31.19-P-1451MFA 
8 Check function of lighting signals on trailer hitch mains outlet (1). IMPORTANT Aid of helper required.  
TRAILER COUPLING MECHANISM

Number Designation Model 118, 177, 206, 243, 247
BA31.11-P-1001-01K Bolt/nut, trailer hitch to longitudinal member reinforcement Nm 140