SPIKES

hoping anybody would know what this is. heard this morning when idling and stopping....it comes and goes in short burst like a dry wiper blade moving on the windshield type of noise. seems to have gone by the time i got to work.
any ideas.
thanks

jim256

I'm not sure if you looked at prior posts, but is it the brake system pump recharging? Sometimes when you open the door prior to starting, sometimes as you stop, sometimes randomly. It maintains fluid pressure on the electrohydraulic brakes. Entirely normal.

SPIKES

hi jim
i notice the rumbling noise when i open the door after the car had "gone to sleep" and i feel it on the pedal when the car is first started in the morning.
this is different but does sound like a hydrolic type noise...i am sure you right.
thanks
frank

DalBenz

Sounds familiar. I think it is common on the E.

MB Fanatic

Nothing to worry about, its just the SBC Brake system charging itself up. And when you shut down the car its just the SBC system shutting down along with all the other electrical gizmos in the car.