THUMP/BUMP when stopping ?
Thread Starter
Newbie
Joined: Mar 2007
Posts: 6
Likes: 0
THUMP/BUMP when stopping ?
I have a 2002 C230 and when I slow to stop, just before the car is dead stopped, I feel a bump or thump like some just rear-ended
me really softly ??
It's really noticeable and happens at almost every stop ???
Any ideas ?
Thanks,
John
me really softly ??
It's really noticeable and happens at almost every stop ???
Any ideas ?
Thanks,
John
Last edited by perryj; Mar 6, 2007 at 02:33 PM.
Moderator Alumni
Joined: Apr 2006
Posts: 3,255
Likes: 22
From: Seattle
w203 m112
Did you check your heat shields? I think someone on the c32/55 forums was saying they had a thump when their car came to a stop. The owner went through some checks here and there only to discover it was just a heat shield that was lose. It appeared to be on tight when the owner looked at it from under the car, so maybe try literally shaking stuff.
I dunno what you mean w/ "play in the tranny" ....
I dunno what you mean w/ "play in the tranny" ....
Senior Member
Joined: Jan 2006
Posts: 491
Likes: 1
From: Redding, California
AMG GTS
2 possibilities in my opinion:
1 ) Warped rotors...when you have warped rotors (Forgive me if you already know this...just want to make it clear if you don't) the surface of your brakes' rotors are uneven...so when you brake (applying pressure on the brake pads onto the rotors) the brake pads will "read" the surface of the rotors...which will be an uneven surface with possibly a lot of bumps...so pretty much the brake pads are going up and down some bumps on your uneven/warped rotors.
2) I forget where I read this...somewhere on this forum, but I heard it's something to do with the fuel lines (or something to do with the fuel). It wasn't brought up too long ago...I'm sure you can find it...but I think their interpretation was that when the guy braked, the fuel would slush at a certain location in the car and that would cause the sound/bump you feel...But again, I'm not exactly sure...but it should be somewhere on the forum.
Good luck with whatever it is...Recently it happened to me....but that's the only time I recall that ever happening...and this was about a week ago.
1 ) Warped rotors...when you have warped rotors (Forgive me if you already know this...just want to make it clear if you don't) the surface of your brakes' rotors are uneven...so when you brake (applying pressure on the brake pads onto the rotors) the brake pads will "read" the surface of the rotors...which will be an uneven surface with possibly a lot of bumps...so pretty much the brake pads are going up and down some bumps on your uneven/warped rotors.
2) I forget where I read this...somewhere on this forum, but I heard it's something to do with the fuel lines (or something to do with the fuel). It wasn't brought up too long ago...I'm sure you can find it...but I think their interpretation was that when the guy braked, the fuel would slush at a certain location in the car and that would cause the sound/bump you feel...But again, I'm not exactly sure...but it should be somewhere on the forum.
Good luck with whatever it is...Recently it happened to me....but that's the only time I recall that ever happening...and this was about a week ago.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
8 Oddball Mercedes Ideas That Actually Made it to Production
Verdad Gallardo
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look
Verdad Gallardo
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Thread Starter
Newbie
Joined: Mar 2007
Posts: 6
Likes: 0
Junior Member
Joined: Mar 2007
Posts: 71
Likes: 0
From: Texas
2007 ML350
if its feels like someone is rear ending you while your stopping, its more than likely the snapring that holds some of the clutches in your transmission has come loose. you will feel it more as u slow down and the trans downshifts from 2-1. there is a bulletin out on this. i have repaired 2 of these problems already. if ur car is still under waranty take it to the dealer. 
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The thump is probably lash in the rear axle being taken up as the transmission does the 2-1 changedown. When last was the transmission serviced? Aside from clutchpack snap rings there was also a software fix that delayed this changedown. The trouble is that most 2002 cars have the non flashable TCU. Only a VIN check will tell which your car has. Also check the rear transmission mouting. Common failure.
Fluid & filter change might improve it. You can catch all of these cars doing it now & again through clumsy driving. Yours is obviously worse. You can also catch out the Torque converter lockup clutch by clumsy driving.
Fluid & filter change might improve it. You can catch all of these cars doing it now & again through clumsy driving. Yours is obviously worse. You can also catch out the Torque converter lockup clutch by clumsy driving.
