Rear Left Mercedes-benz Air Suspension W211 S211 W207 4 matic 2002-2009 CLS Class W219

For Mercedes E-Class W211 S211 W207 4matic 2002-2009 CLS-Class W219 Rear Left 2113200725 2113200725
OEM NO.
 
2113200725 A2113200725 A 211 320 07 25
2113201525 A2113201525 A 211 320 15 25

Air Spring Air Bag Suspension parts
For Mercedes E-Class W211 S211 W207 4matic 2002-2009 CLS-Class W219

This part is compatible with the below vehicles:
 

Other products:

Air springs:

In order to make the frame and body of the cab vibration decay rapidly, improve vehicle ride comfort and comfort, the vehicle suspension system are generally equipped with shock absorber and shock absorber, Guangzhou Jinwei current car widely used two-way cylinder type shock absorber.

Automobile shock absorber is used in the process of wearing parts, shock absorber work, good or bad, will directly affect the driving stationarity and other parts of life, therefore, we should make shock absorber often is in good working condition.
The truck air bag can be used in the following ways to test whether the work of the vibration damper is good:

1. To make the car drive 10km on the poor condition of roads on the road parking, using her hands to feel shock absorber shell, if isn't hot enough, no resistance in the shock absorber and shock absorber does not work. At this point, you can add the appropriate lubricating oil, and then the test, if the shell heat, then the vibration absorber inside the lack of oil, should add enough oil; otherwise, the vibration damper failure.

2 press the bumper, and then release, if the car has 2 ~ 3 jump, then the vibration damper work well.

3 when the car is moving slowly and emergency braking, if the car vibration is more severe, the vibration damper has a problem.

. remove the damper to the upright, and the lower end of the connecting ring clamped in a vise, straining to vibration damping rod several times, at this time should have a stable resistance, to pull (Restoration) of the resistance should be greater than the downward pressure resistance. If the resistance is not stable or no resistance, may is inside a shock absorber to lack of oil or valve parts damaged, repair or replacement of parts.

If there is a problem or failure in the determination of the shock absorber, check whether the damper is leaking or there are traces of old oil spills. Oil seal washer, sealing washer is broken and damaged, and the cylinder cap nut is loose. If oil is found, first tighten the oil cylinder head nut, if the shock absorber still leak may is an oil seal, gasket is damaged, should be replaced with a new seal. If you still can not eliminate oil leakage should be pulled out a vibration damping rod, if feel a hairpin or weight not only for a moment, and then further examination between the piston and cylinder gap is too large, a shock absorber piston rod without bending, surface of the piston rod and the cylinder if there is a scratch or stretch marks. If the damper no oil leakage phenomenon, should check shock absorber connecting pin, connecting rod, connecting hole, a rubber bushing etc. if there is damage, sealing off, rupture, or off the place. If the normal examination of the above, it should be further decomposed shock absorber, check the piston and cylinder with the gap is too large, the cylinder with or without strain, valve seal is good, valve flap and the valve seat fitting is tight, and shock absorber of the tensile spring is too soft or broken, according to the circumstances to take grinding or changing the way the parts repair. In addition, shock absorber in actual use will rattle the fault, which is mainly due to shock absorber and leaf spring and frame or shaft of the collision, the rubber pad damage or loss and shock absorber of the dust tube deformation, caused by insufficient oil should be to identify the reasons, repairs. Shock absorber in check and repair should be in special test platform for performance test, when the resistance frequency in the 100 + 1mm. The stretch of travel and compression stroke resistance should be in accordance with the provisions. Maximum resistance to 392 ~ 588n; Dongfeng car stretching stroke maximum resistance to 2450 to 3038N, compression stroke maximum resistance to 490 to 686N. If there is no experimental conditions, we can also use an empirical approach with an iron rod penetrates into the damper lower end rings, with feet on the live at both ends of the, hands grip ring reciprocating pull 2 ~ 4 times, when to pull the great resistance, downward pressure don't feel laborious, and tensile resistance and repair compared has been restored, no empty feeling process, it indicates that the shock absorber is basic and normal. 

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