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W116 (1972-1980, petrol) W126 (1979-1991, petrol) W140 (1991-1998) W220 (1998-2005)
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  • Power steering servo — removal and installation

Power steering servo — removal and installation (Mercedes-Benz S-Class W126)

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Contents: Removal ↡ Installation ↡
All models are equipped with power steering, which is very convenient. The energy-absorbing element between the steering wheel and the steering column is made of energy-absorbing sheet metal. The steering gear is located behind the front axle and is equipped with a sliding steering column. These design measures prevent the steering column from penetrating into the passenger compartment in the event of a frontal collision. The steering shock absorber absorbs the shocks that occur when driving on bad roads so that the shocks cannot be transmitted to the steering wheel. The steering rod bearings, made of special plastic, do not require further maintenance, except for the very first lubrication at the factory. The power steering maintains such work that the car can easily turn in one direction or another at low speeds, but, on the other hand, maintain good contact with the road at high speeds. If the power steering fails, the car's turning ability remains at the same level completely. Before removing steering components or the power steering pump if any faults occur, you should first check the system on the vehicle. It is recommended that these works be carried out in professional workshops equipped with special devices.

Removal



Suck the oil out of the power steering pump reservoir using a syringe.

Disconnect the high pressure hose and the return hose connection tube from the steering system while holding the connection point on the control, and plug the oil hoses and connection points with plugs.



Remove the lower bolt from the steering coupling.

Disconnect the steering and transverse rods from the steering linkage.

Remove the bolts securing the steering control to the body side member.

Remove the steering gear downwards.

Installation



Installation is carried out in the reverse order of removal, using the middle position bolt and the control bolt 116 589 06 21 00 of the steering control.

Pay attention to the exact position of the hoses, as there are already small places of unnecessary contacts (eg rubbing) in a short time can lead to oil loss and failure of the power steering.

Fill the power steering pump reservoir with the correct type of oil, start the engine and turn the steering wheel right and left several times until it stops, adding oil. The air in the system will come out on its own. Then check the front wheel alignment angles.
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S-Class W126 / Steering
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Dust boot of the articulated joint of the connecting rod and steering rod
Removal and installation tie rod ends
Removal and installation the steering wheel
General description of steering
Removal and installation the power steering pump
Power Steering Fluid Replacement
Removal and installation the articulated joints of the connecting rod
Tie rod/steering rod joint boots — check
Steering gear play — check
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W220 (1998-2005) 
  • General information
  • Introduction to guide
  • User manual
  • Maintenance
  • Power unit
  • Engine repair
  • Cooling and heating systems
  • Power and exhaust systems
  • Ignition and control system
  • Charge and launch systems
  • Transmission
  • Automatic gearbox
  • Drive shafts
  • Chassis
  • Brake system
  • Front suspension
  • Rear suspension
  • Steering
  • Body
  • Body elements
  • Electrical equipment
  • Equipment and devices
  • Electrical circuits
W140 (1991-1998) 
  • User manual
  • Controls and instruments
  • Driving and operation
  • Maintenance
  • Power unit
  • Petrol engine V6
  • Petrol engine V8
  • Petrol engine V12
  • Diesel engine OM603
  • Diesel engine OM606
  • Cooling system
  • Power supply and injection system
  • Control system HFM-SFI
  • Control system LH-SFI
  • Control systems ME-SFI
  • Diesel control system
  • Ignition system
  • Charge and launch system
  • Transmission
  • Mechanical gearbox 717.438
  • Mechanical gearbox 717.454
  • Automatic gearbox 722.5
  • Automatic gearbox 722.6
  • Clutch and drive shafts
  • Differential
  • Chassis
  • Brake system
  • Steering
  • Front suspension
  • Rear suspension
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Electrical equipment
  • Equipment and devices
  • Electrical circuits
W126 (1979-1991, petrol) 
  • Power unit
  • Engine repair
  • Ignition system
  • Lubrication system
  • Cooling system
  • Fuel system
  • Fuel injection system
  • Transmission
  • Clutch and cardan
  • Mechanical gearbox
  • Automatic gearbox
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Electrical equipment
  • Power devices
  • Electrical circuits
W116 (1972-1980, petrol) 
  • General information
  • Introduction to guide
  • Power unit
  • 8-cylinder V8 engine
  • 6-cylinder I6 engine
  • Cooling and lubrication system
  • Power system (carburetor)
  • Fuel injection system
  • Ignition system
  • Transmission
  • Clutch and cardan
  • Car gearbox
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Electrical equipment
  • Power devices
  • Electrical circuits
 
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