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Steering -- Basic Knowledge -- 215 & 220 Chassis: Component Locations Mercedes-Benz Pullman W221

Manual & Power Steering 13 illustrations ~557 words

Steering wheel heater switch, location / task - GF46.11-P-4001M

MODEL 220.025 /026 /028 /063 /065 /067 /070 /073 /074 /075 /083 /084 /087 /125 /126 /128 /165 /167 /170 /173 /174 /175 /176 /178 /183 /184 /187 /874 /875 /876 /878 with CODE (443) Steering wheel heater

MODEL 215.373 /374 /375 /376 /378 with CODE (443) Steering wheel heater

Shown on Model 220

Identifying Steering Wheel Heater Switch Location - Shown On Model 220. Scheme 18

Scheme 18: Identifying Steering Wheel Heater Switch Location - Shown On Model 220
Steering wheel heater switch, locationThe steering wheel heater switch (S59/1s2) is integrated in the front section of the steering column adjustment switch and easy entry/exit (S59/1).
Steering wheel heater switch, taskThe steering wheel heater is switched off and on with the steering wheel heater switch (S59/1s2). In addition the steering wheel heater switch (S59/1s2) takes over the function display by means of an integrated function LED.

DC/DC converter control module, location/task - GF46.11-P-4002M

MODEL 220.025 /026 /028 /063 /065 /067 /070 /073 /074 /075 /083 /084 /087 /125 /126 /128 /165 /167 /170 /173 /174 /175 /176 /178 /183 /184 /187 /874 /875 /876 /878 with CODE (443) Steering wheel heater

MODEL 215.373 /374 /375 /376 /378 with CODE (443) Steering wheel heater

MODEL 230.467 /474 /475 with CODE (443) Steering wheel heater

Shown on Model 220

Identifying DC/DC Converter Control Module Location - Shown On Model 220. Scheme 19

Scheme 19: Identifying DC/DC Converter Control Module Location - Shown On Model 220
DC/DC converter control module, locationThe DC/DC converter control module (N99) is located on the right A-pillar in the area of the footwell.
Models 230.467/474/475GF46.11-P-4002-01R
DC/DC converter control module, taskThe DC/DC converter control module (N99) increases the on-board power supply to 42 Volt or 48 volts in order to achieve an adequate heat output (approx. 100 watts). Furthermore, it takes over the control, monitoring, switching off and diagnosis of the steering wheel heater.

Rack-and-pinion steering gear, location/ task/ design/ function - GF46.20-P-1000B

MODEL 215, 220, 230

Identifying Play Compensator And Steering Gear Housing. Scheme 20

Scheme 9: Identifying Rack-And-Pinion Steering Gear Location

Shown on rack-and-pinion steering in model 220

Rack-and-pinion steering gear, locationModels 215, 220GF46.20-P-1000-02B
Model 230GF46.20-P-1000-02R
Rack-and-pinion steering gear, taskTransmits the steering movements from the steering wheel to the road wheels. Assists the manual steering force, thus making it easier to steer the vehicle.
Rack-and-pinion steering gear, designAn automatic play compensator, the steering dampers and the tie rods are integrated in the steering gear of the rack-and-pinion steering.
Rack-and-pinion steering gear, functionGF46.20-P-1000-01B

Rack-and-pinion steering gear, location - GF46.20-P-1000-02B

Models 215, 220

The rack-and-pinion steering (1) is located in front of the wheel center in the direction of travel and is bolted onto the integral carrier via a mounting plate (2).

Identifying Rack-And-Pinion Steering Damper Components - Models 171.4, 203, 209, 215, 220, 230. Scheme 21

Scheme 13: Identifying Rack And Pinion Steering, Mounting Plate And Integral Carrier

Rack-and-pinion steering play compensator, location / task / function - GF46.20-P-1100B

MODEL 215, 220, 230

Identifying Drive Pinion, Thrust Piece (Spring-Loaded) And Gear Rack. Scheme 22

Scheme 22: Identifying Drive Pinion, Thrust Piece (Spring-Loaded) And Gear Rack
Rack-and-pinion steering play compensator, locationGF46.20-P-1100-01B
Rack-and-pinion steering play compensator, taskThe thrust piece (6c) ensures that the drive pinion (4b) and rack (7) mesh without any play.
Rack-and-pinion steering play compensator, functionEngine ON : Because the hydraulic steering assistance starts immediately, no steering play is noticeable. Engine OFF : When steering, only a slight, gradually increasing torque is noticeable for a travel distance of approx. 50 mm. This is due to the slewing range of the torsion bar in the rotary valve and should not be confused with play in the steering gear. Only when the steering wheel is turned further does the drive pinion begin to roll across the gear rack, which can be felt on the steering wheel in the form of a slight pressure point and a more rapidly torque increase.

Rack-and-pinion steering play compensator, location - GF46.20-P-1100-01B

Models 215, 220, 230

The play compensator (1) for the rack-and-pinion steering is located in the steering gear housing (2) opposite the drive pinion.

Scheme 20: Identifying Play Compensator And Steering Gear Housing

Rack-and-pinion steering damper, location / task / function - GF46.20-P-1200B

MODELS 215, 220, 230

Identifying Rack-And-Pinion Steering Damper Components. Scheme 23

Scheme 23: Identifying Rack-And-Pinion Steering Damper Components

Illustrated steering left

Identifying Perforated Disk. Scheme 24

Scheme 24: Identifying Perforated Disk
Rack-and-pinion steering damper, locationGF46.20-P-1200-01B
Rack-and-pinion steering damper, taskThe task of the integrated steering dampers (4) is to cushion the forces and shocks transmitted from the road surface via the steering linkage.
Rack-and-pinion steering damper, functionGF46.20-P-1200-02A

Rack-and-pinion steering damper, location - GF46.20-P-1200-01B

Models 215, 220, 230

Two steering dampers are integrated in the screwed connections (1).

Identifying Screw Socket. Scheme 25

Scheme 25: Identifying Screw Socket

Power steering pump, location / task / design / function - GF46.30-P-2100B

MODEL 220 except CODE (487a) Active body control (ABC)

Identifying Power Steering Pump. Scheme 26

Scheme 26: Identifying Power Steering Pump
Power steering pump, locationGF46.30-P-2100-02B
Power steering pump, taskSupplies the steering gear with pressure oil irrespective of engine speed
Power steering pump, designPrinciple of the vane-type pump
Power steering pump, functionGF46.30-P-2100-01B

Tandem pump, location/task/design/function - GF46.30-P-3300A

MODEL 215

MODEL 220, 230 with CODE (487a) Active body control (ABC)

Manufacturer identification

LFR430=

LuK Vehicle hydraulics GmbH & Co KG

Identifying Tandem Pump And ABC Suction Restrictor Valve. Scheme 27

Scheme 27: Identifying Tandem Pump And ABC Suction Restrictor Valve
Tandem pump, locationOn front side of engine.
Tandem pump, taskProduces different oil pressures and volume flows irrespective of engine speed for the steering system and the active body control (ABC) system.
Tandem pump, designGF46.30-P-3300-03A
Tandem pump, functionPower steering pump componentGF46.30-P-3300-04A
Radial piston pump component (ABC)GF46.30-P-3300-04B

SPS solenoid valve, location / task / design / function - GF46.50-P-5000B

MODEL 171.4, 203, 209, 211 with CODE (213a) Speed-sensitive power steering

MODELS 215, 220, 230

Shows model 220

Identifying SPS Solenoid Valve - Shows Model 220. Scheme 28

Scheme 28: Identifying SPS Solenoid Valve - Shows Model 220
SPS solenoid valve, locationGF46.50-P-5000-02B
SPS solenoid valve, taskControl of steering wheel moment in the vehicle speed range of v = 0 km/h to v = 100 km/h.
SPS solenoid valve, designCurrent-controlled proportional valve.
SPS solenoid valve, functionType 171.4GF46.50-P-5000-01SK
Model 203.0 up to 31.07.01GF46.50-P-5000-01P
Model 203.0 as of 01.08.01 Model 203.2, 203.7 Model 209, 211, 215, 220, 230GF46.50-P-5000-01B

SPS solenoid valve, location - GF46.50-P-5000-02B

Models 171.4, 203, 209, 211 with code (213a) speed-sensitive power steering

Models 215, 220, 230

Rotary valve and control bush housing for models 215 and 220 illustrated

Identifying SPS Solenoid Valve Components - Rotary Valve And Control Bush Housing For Models 215 And 220 Illustrated. Scheme 29

Scheme 29: Identifying SPS Solenoid Valve Components - Rotary Valve And Control Bush Housing For Models 215 And 220 Illustrated

The SPS solenoid valve (Y10) is bolted onto the rotary valve and control bush housing (1) of the rack-and-pinion steering (2).

Survey of system components, speed-sensitive power steering (SPS), location/task/design/function - GF46.50-P-9990A

MODEL 215, 220, 230

Power steering pump, location/task/design/ functionModel 220 except code (487a) Active body control (ABC)GF46.30-P-2100B
Model 230 except code (487a) Active body control (ABC)GF46.30-P-2100R
Tandem pump, location/task/design/functionModels 215, 220, 230 with code (487a) Active body control (ABC)GF46.30-P-3300A
Rack-and-pinion steering gear, location/task/design/functionGF46.20-P-1000B
Rack-and-pinion steering play compensator, location/task/functionGF46.20-P-1100B
Rack-and-pinion steering damper, location/task/functionGF46.20-P-1200B
SPS solenoid valve, location/task/design/functionGF46.50-P-5000B
Contents, function description, speed-sensitive power steering (SPS)GF46.50-P-0999A