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Home >> Mercedes Benz >> 2007 >> C350 Base, Automatic >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Suspension -- 203 Chassis >> Testing & Repair >> Checking shock absorber - AR32.25-P-0121A

Checking shock absorber - AR32.25-P-0121A

MODEL 129 

MODEL 140 

MODEL 163.113 /128 /136 /154 /157 /172 /174 /175 

MODEL 168 

MODEL 170 

MODEL 202 

MODEL 203 

MODEL 208 

MODEL 209.3/ 4 

MODEL 210 except CODE (489) Airmatic (semi-active air suspension) 

MODEL 211.0 /2 /6 except CODE (489) Airmatic (semi-active air suspension) 

MODEL 414 

MODEL 230 except CODE (487) Active Body Control (ABC) 

MODEL 164, 251 except CODE (489) Airmatic (air suspension with level adjustment and adaptive damping system ADS) 

Shown on shock absorber in model 202 

Fig 1: Checking Shock Absorber - Shown On Shock Absorber In Model 202
G04606836
INSPECT Checking     
1.1 Check piston rod for surface damage, bending and for moving in the guide bush without jamming IMPORTANT Only if the old shock absorber is to be installed again.  
    IMPORTANT Dispose of shock absorber if necessary.
IMPORTANT By workshop: ↓
 
REFER TO FORMS Disposing of shock absorber Model 129, 140, 170, 202, 208, 210 OS32.25-P-0121-01A
REFER TO FORMS   Models 163, 164, 251 OS32.25-P-0121-01GH
REFER TO FORMS   Model 168, 203, 209, 414.700 OS32.25-P-0121-01GC 
REFER TO FORMS   Model 211 OS32.25-P-0121-01TX
    Model 230  
    IMPORTANT Disposal by scrap dealer: ↓  
REFER TO FORMS   Notes on scrapping gas-filled hydraulic components OS00.00-P-1000-01A
2.1 Check damper for external oil leaks IMPORTANT Only if the old shock absorber is to be installed again
IMPORTANT A thin film of oil on the shock absorber is permissible.
IMPORTANT Dispose of shock absorber if necessary.
IMPORTANT By workshop: ↓
 
REFER TO FORMS Disposing of shock absorber Model 129, 140, 170, 202, 208, 210 OS32.25-P-0121-01A
REFER TO FORMS   Models 163, 164, 251 OS32.25-P-0121-01GH
REFER TO FORMS   Model 168, 203, 209, 414.700 OS32.25-P-0121-01GC 
REFER TO FORMS   Model 211 OS32.25-P-0121-01TX
    Model 230
IMPORTANT Disposal by scrap dealer: ↓
 
REFER TO FORMS   Notes on scrapping gas-filled hydraulic components OS00.00-P-1000-01A
3.1 Check shock absorber for internal leakage IMPORTANT Only if the old shock absorber is to be installed again.
IMPORTANT This test is not possible on models 140, 163, 164, 168, 203, 209, 251, 414.700.
IMPORTANT The volume of oil in the shock absorber is determined by means of the projection length (a) of the piston rod.
IMPORTANT Push in piston rod as far as it will go. Then hold vertically so that piston rod points down, and measure projection length (a) of piston rod.
Shock absorber in new condition:
 
    Shock absorber in used condition:  
    Model 129, 170, 202, 208, 210, 211, 230 *BE32.25-P-1002-02A 
    Model 129, 170, 202, 208, 210, 211, 230
If shock absorber exceeds specified value, dispose of it:
IMPORTANT By workshop: ↓
*BE32.25-P-1001-02A 
REFER TO FORMS Disposing of shock absorber Model 129, 170, 202, 208, 210 OS32.25-P-0121-01A
REFER TO FORMS   Model 211 OS32.25-P-0121-01TX
    Model 230
IMPORTANT Disposal by scrap dealer: ↓
 
REFER TO FORMS   Notes on scrapping gas-filled hydraulic components OS00.00-P-1000-01A
4.1 Check rubber mount in housing eye, replace if necessary IMPORTANT Only on shock absorbers with rubber mount in housing eye and only if the shock absorber is not replaced.
NOTES The rubber mounts must be seated securely in the body eye and must not be cracked or damaged.
If fitted, damaged rubber mounts can cause knocking noises.
 
TEST VALUES FOR SHOCK ABSORBER

Number Designation Model 129 Model 170 Model 202
BE32.25-P-1001-02A Oil reserve check (shock absorber when new) mm 0+2 0+2 0+2
BE32.25-P-1002-02A Oil reserve check (shock absorber when used) mm ≤20 ≤20 ≤20
TEST VALUES FOR SHOCK ABSORBER

Number Designation Model 208 Model 210 Model 211
BE32.25-P-1001-02A Oil reserve check (shock absorber when new) mm 0+2 0+2 0+2
BE32.25-P-1002-02A Oil reserve check (shock absorber when used) mm ≤20 ≤20 ≤20
TEST VALUES FOR SHOCK ABSORBER

Number Designation Model 230
BE32.25-P-1001-02A Oil reserve check (shock absorber when new) mm 0+2
BE32.25-P-1002-02A Oil reserve check (shock absorber when used) mm ≤20