New and just got a merc with a weird static type sound only when driving (not the radio)

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jasonc46

New Member
Joined
Apr 22, 2021
Messages
2
Location
LONDON
Car
Mercedes c200 kompressor petrol 1.8 2005
Hi everyone just Joined my name is Jason and I am from London, I was not sure where to post so I initially posted under the engine section.

Anyway I just got a .. Mercedes c200 kompressor petrol and lpg bi fuel gas c class c220 on ebay 2005

Loverly drive BUT,,,,

I probably should not bought this car because i had an uneasy feeling about the seller and there are some problems :(

After the purchase i decided to have another drive and i could hear what seemed like the radio between stations. I didn't pay attention during the pre purchase test drive, I don't even remember hearing it. I initially just thought it was the radio but i still heard the sound when the radio was off.

It only makes the sound when driving and seems less pronounced when coasting.

Very strange it's almost like its coming from the front dash near the windscreen as if its a static speaker sound.

Its not very loud but still loud enough to be something that really distracts from driving.

Other slightly alarming signs where the auto shifter not seeming to select gear when stationary.

I turned the car off, restarted it and the problem was gone but on one or 2 occasions it did seem to jolt into gear even when driving as well.

Also when I was stationary and moved through the gears by hand the car did seem to jolt into gear like you really knew when reverse or drive was selected.

The seller informed me under the gear box fascia to the left was a screw apparently put there to move what i guess is gearbox sensor?

And then we move onto the brakes that have a pronounced knock sound when brake pedal is pushed quickly.

Does anyone know what these problems might be?

1. The static "radio" sound which appears only when driving
2. Jolt/ heavy gear selection when static and sometimes like the gear stick wont actually select any gear or move.
3. Less prominent but when driving a jolt into gear
4. Clonk when the brakes are pressed quickly (like a knock sound)

Other then that this is my first Merc and its a Joy to drive very comfy :) just hope their isn't any major work needed :(
 
Welcome, I am new here too, I am always reluctant to believe sellers that something is a slight problem because if it was cheap and easy to fix then they would have done it to get a better price for the car. Hopefully you will get it sorted and enjoy being a mercedes owner
 
Check that the clip which holds the handbrake cable isn’t broken, and allowing the propshaft to touch against it.
This may be your ‘static’ noise.
 

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