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Home >> Mercedes Benz >> 2009 >> ML320 >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Seats, Restraint Systems - 164 Chassis >> Testing & Repair >> Remove/install WSS sensor - AR91.60-P-0810 >> Remove/install WSS sensor - AR91.60-P-0810GZA

Remove/install WSS sensor - AR91.60-P-0810GZA

MODEL 164 with CODE (494) USA version 

Only front seat on passenger side, left rear WSS sensor and right rear WSS sensor 

Fig 1: Identifying Front Seat, Bolts, Electrical Connector And Left/Right Front WSS Sensor - Shown On Right Rear WSS Sensor (B48/14)
G05261125Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Shown on right rear WSS sensor (weight sensing system) (B48/14) 

Fig 2: Identifying Front Seat, Bolts, WSS Control Unit And Left/Right Front WSS Sensor - Shown On Right Rear WSS Sensor (B48/14)
G05261126Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Shown on right rear WSS sensor (weight sensing system) (B48/14) 

REMOVINGINSTALLING Remove/install    
DANGER Risk of injury  caused by performing testing or repair work on airbag or emergency tensioning retractor units. Store airbag units with deployment side facing up; do not expose to temperatures greater than 100°C. When working on these units, disconnect the power supply. AS91.00-Z-0001-01A 
NOTES Notes on avoiding damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
1 Remove front seat (1) on passenger side   AR91.10-P-1000GZ 
2 Unclip electrical line from right rear WSS sensor (weight sensing system) (B48/14) from circlips (arrow A and arrow B) IMPORTANT Do not damage electrical line on right rear WSS sensor (weight sensing system) (B48/14).  
3 Disconnect electrical connector (4) from WSS control unit (weight sensing system) (N2/13) (arrow C)    
4 Unscrew nut (3) and remove bolts (2) IMPORTANT Install bolt (2) only with associated left rear WSS sensor (weight sensing system) (B48/13) or right rear WSS sensor (weight sensing system) (B48/14).
IMPORTANTInstallation:  Lightly grease bolt (2) before installing and hold when tightening nut (3).
 
    TORQUE SPECIFICATION *BA91.60-P-1011-01H 
5 Remove screws (5) TORQUE SPECIFICATION *BA91.60-P-1013-01H 
6 Remove left rear WSS sensor (weight sensing system) (B48/13) or right rear WSS sensor (weight sensing system) (B48/14) together with installed bracket (6) NOTES Never loosen or remove mount from left rear WSS sensor (weight sensing system) (B48/13) or right rear WSS sensor (weight sensing system) (B48/14)! This would render the left rear WSS sensor (weight sensing system) (B48/13) or right rear WSS sensor (weight sensing system) (B48/14) unusable  
7 Check plastic bearing (7) for wear and replace if necessary IMPORTANT If required, remove retaining ring (8) and drive out plastic bearing with suitable tool.
IMPORTANTInstallation:  Install new plastic bearing by hand and fasten with circlip.
 
8 Install in the reverse order    
9 Calibrate left front WSS sensor (weight sensing system) (B48/11), right front WSS sensor (weight sensing system) (B48/12), left rear WSS sensor (weight sensing system) (B48/13) and right rear WSS sensor (weight sensing system) (B48/14) with STAR diagnosis system. SPECIAL TOOL Plates Figure
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory   AD00.00-P-2000-04A
    STAR DIAGNOSIS diagnosis system *WH58.30-Z-1048-13A 
AIRBAG

Number Designation Model 164.1/8
BA91.60-P-1011-01H Nut for bolts on WSS sensor (Weight Sensing System) Nm 5
BA91.60-P-1013-01H Bolt, rear WSS sensor (weight sensing system) at seat rail Nm 20
Fig 3: Identifying Plates (211 589 00 32 00)
G05261127Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
COMMERCIALLY AVAILABLE TOOLS

Number Designation
WH58.30-Z-1048-13A STAR DIAGNOSIS diagnosis system, Compact Passenger Car 6511 1801 00