Don’t Let Oil Fool You in Mercedes-Benz
This bulletin applies to 2019 Mercedes-Benz models 205, 213, 238, 253, 117, 242 and 246 without Air-Matic. Shock absorbers on the rear axle can appear to be extremely oiled due to adhering road dirt and dust.
This does not always indicate a leaky shock absorber. The cause is likely residual oil from the shock assembly or oil mist from the shock operation.
If there are not complaints of noise or ride quality, thoroughly clean the dirt and oil from the shock tube first, then perform a test drive of about 10 minutes.
If fresh oil droplets or streaks form on the cleaned shock absorber, then the shock is leaking and must be replaced.