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#1
06-25-2007, 05:05 AM
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sharp slapping sound !
Hi all
Thank you for allowing me on this forum I live in the UK and own a 2001 C class 240. There is a sharp knocking /slapping sound that has developed whilst the car is under heavy braking. This seems to come from around the drivers side engine area but I maybe wrong. I have checked the wheels and tryes all seems fine, there are no loose bits hanging in the engine bay. A local non mercedes garage tested it and says its the ABS mechanism failed. The car brakes fine. The sound is intermittent. This weekend though after a three days of heavy rainfall, the BAS brake assist light has now come on and I am worried this is something big!!! Any ideas on what this could be? Thanks you in advance Worried C class driver! Last edited by manna90; 06-25-2007 at 08:15 AM. 
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#3
06-28-2007, 08:12 AM
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Having the TRACTION system scanned for codes would be a starting point.
If you post those codes we could help with diagnosis. Have the front lower control arm bushings check for wear as well.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#5
07-05-2007, 08:55 AM
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Ohhhhh my God!
Hi all
The BAS issue turned out to be due to a faulty switch only £15 plus fitting at £20. However all my suspension bushes are apparently worn out and I have a broken rear spring brought on by ...wait for it... me having fitted 255/35/18 lorinser alloy wheels and tyres at the back and 225/40/18 at the front. The garage said the C240 wasnt designed to handle such large wheels!!!Is that true? He asked if I was sitting down before he would tell me how much to fix all this.....£1124. I am gutted!
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#6
07-05-2007, 10:00 AM
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A rubber rebuild on a 6 year old car? Sheesh
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1989 300E 144K
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#7
07-05-2007, 10:02 AM
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i find it amazing that the sellers of these large diameter wheels are allowed to sell them based only on whether they will fit without rubbing the fender.rule of thumb with mercedes is only one inch larger than stock.in germany the tuf requires that the title of the car be endorsed with non factory wheel type and specification but only if on the approved list.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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#9
07-06-2007, 08:41 AM
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I dont know what to say or think at the moment because whilst I was having my rear tyres swapped for new ones, I asked the tyre guy to check the rear springs (since the other garage had told me that i had a broken spring) and he could not see any damaged springs. I went under with him and using a bright torch, we inspected both rear springs - they are as good as new.
Now in the UK, we do have a legally required vehicle check called an MOT and the other garage actually failed me on 2 rear below legal limit tyres plus a rear broken spring! I want to visit a main dealer now and get them checked then haul his ass to court if they are found to be ok. Am back to square one - still have the slapping sound and a lighter wallet! Watch this space
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