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Home >> Mercedes Benz >> 2007 >> C350 Base, Automatic >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Suspension -- 203 Chassis >> Testing & Repair >> Rear suspension-control module - Operation check - AR32.30-P-0520A

Rear suspension-control module - Operation check - AR32.30-P-0520A

MODEL 140, 210 with CODE (217a) Self-levelling suspension on rear axle with ADS with CODE (480) Level control system at rear 

MODEL 202, 203.2, 208 with CODE (480) Level control system at rear 

Fig 1: Identifying Rear Suspension-Control Module - Operation Check (1 Of 2)
G04624740
Fig 2: Identifying Rear Suspension-Control Module - Operation Check (2 Of 2)
G04624741
REMOVINGINSTALLING Removing, installing     
IMPORTANT The vehicle must be parked with its weight on its wheels     
1 Check fluid level in reservoir, correct as indicated Model Series 140, 202, 203.2, 208 AP32.30-P-3211BA 
    Model 210 AP32.30-P-3211BB
2.1 Remove linkage rod or relay linkage (7) from suspension-control module lever (arrows)    
2.2 Remove linkage rod for suspension-control module/torsion bar at ball joint Model 203.2  
DANGER Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  from contusions and burns if you insert your hands into the engine when it is started or when it is running Secure vehicle to prevent it from moving off by itself.
Wear closed and close-fitting work clothes.
Do not touch hot or rotating parts.
AS00.00-Z-0005-01A
3 Start engine and allow to idle    
INSPECT Inspecting     
4 Press suspension-control module lever to position "fill" (F) NOTES Because the pressures are considerable, keep test as brief as possible.
IMPORTANT The rear of the vehicle should rise. The suspension-control module's bypass valve limits the supply pressure of the hydraulic pump. The bypass valve emits a whistling noise as it opens.
If the rear of the vehicle fails to rise within approximately 30 seconds ↓
Model Series 140, 202, 203.2, 208 Disconnect return line (T) from reservoir (2), if fluid emerges ↓
 
    Replace rear axle level controller AR32.30-P-0670A 
    Model 210
Checking hydraulic pump
AR32.30-P-0510A 
    If supply rate is within specification, but pressure is too low ↓
Replace rear axle level controller
AR32.30-P-0670A 
    Model Series 140, 202, 203.2, 208
If no fluid emerges from the return line
Check hydraulic pump
AR32.30-P-0510A 
5 Set level controller lever to "Empty" position (L)    
6 Switch off engine    
INSTALLING Installing     
7.1 Connect linkage rod or relay linkage (7) to suspension-control module lever (arrows) Models 140, 202, 208, 210
IMPORTANT Replace self-locking bolts and nuts.
 
7.2 Connect linkage rod for suspension-control module/torsion bar at ball joint Model 203.2  
8 Check fluid level in reservoir, correct as indicated Models 140, 202, 208 AP32.30-P-3211BA 
    Model 210 AP32.30-P-3211BB