Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2013 Mercedes Benz S350FACTORY OEM SERVICE PROCEDURE
Seats, Bunks, Restraint Systems - 221 Chassis - 3 Of 4
- Testing & Repair
- Remove/install head restraint drive unit - AR91.29-P-1200SX
- Remove/install front seat control unit - AR91.29-P-1550SX
- Remove/install rear seat control module - AR91.29-P-1570M
- Remove/install rear seat control unit - AR91.29-P-1570SX
- Checking recognition of actuation state of emergency/compact tensioning retractors - AR91.40-P-0612SX
- Remove/install seat belt with emergency tensioning retractor - AR91.40-P-0630SX
- Remove/install rear seat belts
- Remove, replace and install rear center seat belt - AR91.40-P-0683SX
- Remove/install seat belt height adjustment mechanism (front seat) - AR91.40-P-1100SX
- Seat belt height adjustment mechanism (front seat) removal and installation - AR91.40-P-1100SXA
- Remove/install seat belt buckle (front seat) - AR91.40-P-1515SX
- Remove/install rear seat belt buckle - AR91.40-P-1516SX
- Remove/install driver kneebag - AR91.60-P-0200SX
- Remove/install restraint systems control unit - AR91.60-P-0624SX
- Remove/install airbag unit on the steering wheel - AR91.60-P-0660SX
- Remove/install passenger airbag unit - AR91.60-P-0680SX
- Removing, installing windowbag
- Remove/install sidebag unit in the rear
- Remove/install front seat sidebag unit - AR91.60-P-0695SX
- Remove/install seat occupancy recognition sensor - AR91.60-P-0720SX
- Remove/install sensor for sidebag/windowbag
- Remove/install front acceleration sensor - AR91.60-P-0750MB
- Test & Adjustment Values
- Maintenance
- Retrofitting & Conversion
- Torque Specifications
- Wiring Diagrams
- Overview of wiring diagrams for seats, bunks, restraint systems - PE91.00-P-1100SAA
- Survey of wiring diagrams of seats, bunks, restraint systems - PE91.00-U-1100SAA
- Block diagram of retractable rear head restraint (RHR) - PE91.16-P-2001SB
- Legend of electrical function schematic for lifting retractable rear head restraints (RHR [KAF]) - PE91.16-P-2051-60SAA
- Electrical function schematic for lifting retractable rear head restraints (RHR [KAF])
- Legend of electrical function schematic for folding down retractable rear head restraints (RHR [KAF])
- Electrical function schematic for folding down retractable rear head restraints (RHR [KAF])
- Electrical function schematic for folding down retractable rear head restraints (RHR [KAF]) - PE91.16-P-2052-97SAA
- Electrical function schematic for folding down retractable rear head restraints (RHR [KAF]) - PE91.16-P-2052-97SAB
- Electrical function schematic for folding down retractable rear head restraints (RHR [KAF]) - PE91.16-P-2052SAA
- Electrical function schematic for folding down retractable rear head restraints (RHR [KAF]) - PE91.16-P-2052SAB
- Block diagram retractable rear head restraints (RHR) - PE91.16-U-2001SA
- Electrical function diagram for retractable rear head restraints (RHR) - PE91.16-U-2050SA
- Electrical function schematic for raising retractable rear head restraints (RHR)
- Electrical function schematic for lowering retractable rear head restraints (RHR)
- Electrical function schematic for lowering retractable rear head restraints (RHR) - PE91.16-U-2052-97SAA
- Electrical function schematic for lowering retractable rear head restraints (RHR) - PE91.16-U-2052-97SAB
- Electrical function schematic for lowering retractable rear head restraints (RHR) - PE91.16-U-2052SAA
- Electrical function schematic for lowering retractable rear head restraints (RHR) - PE91.16-U-2052SAB
- Block diagram of multicontour seat (MCS)
- Legend of electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050-60SAB
- Electrical function schematic for dynamic seat (FDS)
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050-97SAB
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050-97SAC
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050-97SAD
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050SAB
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050SAC
- Electrical function schematic for dynamic seat (FDS) - PE91.25-P-2050SAD
- Electrical function schematic for multicontour seat
- Wiring diagram for left front dynamic seat control unit
- Wiring diagram for left front dynamic seat control unit - PE91.25-P-2101-97SAA
- Wiring diagram for left front dynamic seat control unit - PE91.25-P-2101SAA
- Wiring diagram for left front dynamic seat control unit - PE91.25-P-2102-97SAA
- Wiring diagram for left front dynamic seat control unit - PE91.25-P-2102SAA
- Legend of wiring diagram for left rear multicontour backrest control unit - PE91.25-P-2110-60SAA
- Left rear multicontour backrest control unit wiring diagram
- Legend of wiring diagram for right rear multicontour backrest control unit - PE91.25-P-2120-60SAA
- Right rear multicontour backrest control unit wiring diagram
- Block diagram multicontour seat (MCS) - PE91.25-U-2001SA
- Electrical function diagram for dynamic seat (FDS) - PE91.25-U-2050-97SAA
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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