E230 Auto Overrun thump when I brake - Any Ideas
#1
E230 Auto Overrun thump when I brake - Any Ideas
Hi,
My pride and joy E230 Auto has only one problem. When I brake following a period of time on a straight road, the car seems to experience a thump like someone has bumped into my rear end. It seems to me as if the clutch orsomething isn't disengaging the drive on time.
Is this a common problem and can someone help me diagnose the problem.
Much obliged for any help.
My pride and joy E230 Auto has only one problem. When I brake following a period of time on a straight road, the car seems to experience a thump like someone has bumped into my rear end. It seems to me as if the clutch orsomething isn't disengaging the drive on time.
Is this a common problem and can someone help me diagnose the problem.
Much obliged for any help.
#2
RE: E230 Auto Overrun thump when I brake - Any Ideas
Hi,
Is this when you brake or go onto overrun i.e. just engine braking. Tryt repeatedly applying power and then off in a rythmic pattern a few times.
If the later it is likely the diff mountings especially the diff nose.
If the former then I suspect a suspension bushing is shot or loose.
I assume you have nothing loose in the boot / under rear floor. e.g. Battery?
Mileage?
Vehicle history?
Might help locate problem.
Is this when you brake or go onto overrun i.e. just engine braking. Tryt repeatedly applying power and then off in a rythmic pattern a few times.
If the later it is likely the diff mountings especially the diff nose.
If the former then I suspect a suspension bushing is shot or loose.
I assume you have nothing loose in the boot / under rear floor. e.g. Battery?
Mileage?
Vehicle history?
Might help locate problem.
#3
RE: E230 Auto Overrun thump when I brake - Any Ideas
Thanks that gives me something to discuss with my mechanic friend.
My car has 140,000 miles with a good service history and runs very well. I usually experience the problem when i've been on the motorway and come off an off ramp slowing to a stop with gentle braking. It can also happen in town when stopping at traffic lights.
I'm confident its not anything loose in the boot or bonnet.
My car has 140,000 miles with a good service history and runs very well. I usually experience the problem when i've been on the motorway and come off an off ramp slowing to a stop with gentle braking. It can also happen in town when stopping at traffic lights.
I'm confident its not anything loose in the boot or bonnet.
#7
RE: E230 Auto Overrun thump when I brake - Any Ideas
ORIGINAL: leon s.
... my car has a clack noise just before to come at full stop..
... my car has a clack noise just before to come at full stop..
I do not actually know what makes this noise. I suspect that it is something in the gearbox.
I will find out since I am also interested unless of course somebody watching this thread already knows.
Stuart
#8
RE: E230 Auto Overrun thump when I brake - Any Ideas
Ju8st to clarify further, there is no actual noise that can be heard whilst driving. The thump is a physical lurch forward with no perceptible noise. The explanation that it could be a delay in the gearbox changing down from 2 to 1 seems plausible to me.
Thanks for the ongoing interest.
Thanks for the ongoing interest.
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