Facts:
When a shock absorber is faulty on one side (leaking, noises, limit values exceeded on the shock tester), often both shock absorbers on the axle in question are replaced.
E32, E34, E38, E39: In the case of rear spring struts with ride-height control, there is always a slight oil spillage on the piston rod. These spring struts are permitted to be wet with oil over a maximum of half the shock absorber length on the outer tube, i.e. they are permitted to "sweat".
Consequence:
This is not necessary for technical reasons and causes the manufacturer not to recognize the unnecessarily removed shock absorbers as damaged parts. Unnecessarily high costs for the customer can be avoided by replacing the shock absorber on one side only.
Procedure:
Shock absorbers may be replaced on one side only until they have completed 50 000 km service.
Exception: On all M-GmbH models, when a limit value is exceeded on one side, it is still necessary always to replace both shock absorbers on the relevant axle.
Removing And Installing/Replacing Rear Left Or Right Shock Absorber
Replacing Rear Left Or Right Thrust Bearing For Spring Strut/Shock
Absorber
Springs With Suspension
For Your Own Safety
Ambient air package