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#1
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(Not) Good Vibrations
My '89 560SEL has developed an alarming front end vibration. It's somewhat intermittant, generally starts around 50mph and seems to be the right side front wheel.
The vibration stops when I drag the brake a bit, but there doesn't seem to be any wheel bearing play or pad kick back. When I lift the car to check, everything seems normal and I can't find any play in the ball joints, tie rods, wheel bearings, etc. I replaced the outer tie rod end (no play, but it seemed a bit more free than the others). I replaced the front shocks at the insistance of my local tire shop. Any other ideas? Or should I just replace things one by one until I find the problem?
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Tom Gentry '89 Mercedes-Benz 560 SEL '96 SVT Mustang Cobra (Mystic #1345) Life is too short to drive boring cars! |
#2
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based on your description your problem is the brake reaction rod bushings.if you look under car you will see thick angled rod at approx 45 deg to direction of travel that starts at bottom of spring and terminates at body with two large round bushings supporting the lower side.these are sometimes called the castor joints because adjustment alters the castor.to check have car driven at 3mph while you stand by front wheel and have them stomp on brake .you will see the wheel move in the wheel well.
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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 |
#3
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Correction
Quote:
Suspension Guide Rod Replacement on the 1985 300SD http://www.peachparts.com/Wikka/W126GuideRod http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126039%5F568&M=117%2E968&GA=722%2E323350&L=765%2E706&CT=F&cat=568&SID=33&SGR=030&SGN=02 Have a great day.
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#4
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Answer:
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#2. If the issue is still there, I would inspect the idler arm and ball joints; if they are good, replace the RF wheel bearings, (cheap insurance). #3. Should the issue still be there, take it to your local MB dealer for inspection and diagnosis, it may be a major safety issue. |
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