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Home >> Mercedes Benz >> 2019 >> GLS550 >> Repair and Diagnosis >> Restraints >> Seat Belts >> Seats, Bunks, Restraint Systems - 166 Chassis 2 Of 3 >> Testing & Repair >> Remove/Install Left Rear Seat Backrest Cover - AR91.18-P-1874GQ

Remove/Install Left Rear Seat Backrest Cover - AR91.18-P-1874GQ

Model 166 

Illustrated on model 166.0 

G14139521Courtesy of MERCEDES-BENZ USA

Model 166.8 

Fig 1: Left Rear Seat Backrest Cover Components Location - Model 166.8 (Illustrated On Model 166.0)
G14139522Courtesy of MERCEDES-BENZ USA

Illustrated on model 166.0 

G14139523Courtesy of MERCEDES-BENZ USA

Illustrated on model 166.0 

G14139524Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
WARNING Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities. No parts of the body or limbs should be within the operating area of mechanical components when moving components. AS00.00-Z-0009-01A
WARNING 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 on performing repair, body work and welding on vehicles with airbags and RTE units   AH91.00-P-0002-01M
Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Assessment of airbag and belt tensioner units in accident vehicles   AH91.00-P-0006-01B
  Legal requirements on handling and storing airbags and emergency tensioning retractor units   AH91.00-P-0004-01A
1 Remove rear backrest Model 166.0 60% rear seat AR91.12-P-1620GQ
2 Remove screw/bolt on bottom of belt end fitting to rear seat and remove left rear seat Model 166.8 2nd seat row AR91.12-P-1000GQ 
    TORQUE SPECIFICATION Bolt, belt end fitting/seat belt lock, rear seat on body/seat *BA91.40-P-1007-01R 
3 Remove armrest for divided rear backrest   AR91.12-P-1750GQ 
4 Remove paneling (6) IMPORTANT To do this, slide paneling (6) upwards and remove.  
5 Unhook cover (1) in area of armrest on rear backrest frame and unclip    
6 Unclip control lever (2) on rear backrest frame and remove cover (4) Model 166.0  
7 Unclip covers (4a)    
8 Remove rear head restraint guides of backrest   AR91.16-P-1775GZ 
9 Remove paneling of rear backrest   AR91.12-P-1134GQA 
10 Remove (5e) retaining clips Model 166.8  
11 Remove cover (5) and belt guide (5a) from cover (1) IMPORTANT To do this, position long wedge between cover (1) and belt guide (5a) and unclip retaining clips (5b).  
    SPECIAL TOOL Long wedge Fig 2
12 Remove cover (5) and belt guide (5a) from seat belt INSTALLATION IMPORTANT Do not twist seat belt.  
13 Unclip retaining clips (5c, 5d) and remove cover (5) from belt guide (5a) INSTALLATION IMPORTANT First clip in the retaining clips (5c).  
14 Remove cover (1) with assembly wedge (01) from frame of rear backrest SPECIAL TOOL Mounting wedge Fig 3
15 Remove switch for folding rear seat backrest from rear seat rest Model 166.8 with code 843 (Electric EASY-ENTRY)  
16 Release and disconnect electrical connector (7) from side airbag INSTALLATION IMPORTANT Ensure that electrical connector (7) is engaged correctly and electrical line is routed correctly.  
17 Disconnect electrical connector from seat heater Model 166 with code 872 (Heated rear seats)  
18 Remove cover (1) and padding from frame of rear backrest INSTALLATION IMPORTANT Ensure that pocket (1a) is seated correctly at side airbag.  
19 Unhook cover staple wires (1) on padding from retaining clips (3) INSTALLATION IMPORTANT Ensure that cover (1) is seated correctly on padding.  
20 Install in the reverse order    
SEAT BELTS/EMERGENCY TENSIONING RETRACTORS

Number Designation Model 166
BA91.40-P-1007-01R Bolt, belt end fitting/seat belt lock, rear seat on body/seat Nm 35
Fig 2: Identifying Mounting Wedge (110 589 03 59 00)
G07070400Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Long Wedge (115 589 03 59 00)
G07070400Courtesy of MERCEDES-BENZ USA