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#1
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Brakes pulsating
I have a 1997 E300 and I feel a pulsation in the steering wheel when the brakes are applied; particularly when I am decending on a grade. This is intermittent. I replaced all four rotors which corrected the problem for approximately 3000 miles. However, it is starting again. I have checked the rotors since and there does not appear to be warpage or any irregularities.
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#2
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You have to make sure and put a little anti-sieze on the contact surfaces of the rotor to the hub.
Also, you could have been braking and hit a puddle of water and warped them again. Or, a two footed driver will cause this quickly.
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Benzmac: Donnie Drummonds ASE CERTIFIED MASTER AUTO TECHNICIAN MERCEDES SPECIALIST 11 YRS |
#3
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Or you may have a seized brake caliper which always keep pressure on the brake pads with the result of overheating the brake rotor.
Jackd |
#4
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Benzmac:
Are you serious? Hitting a puddle of water can warp the rotor. Thanks Car Nut 99 E430 Sport |
#5
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CarNut,
I bet if your brakes are hot enough it can happen (and if they had been machined, that might make it more possible).
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2006 E350 w/ 155k miles (Daily Driver) Previous: 1993 300E 3.2L Sedan w/ close to about 300k miles 2003 E500 Brilliant Silver (Had 217k miles when totalled!) 1989 300E with 289,000 miles (had for <1 yr while in HI) 03 CLK 500 cabrio (Mom's) 2006 C230k (Dad's) 1999 S420 (Mom's/Dad's) 2000 C230k Sport sedans 2001 CLK320 Cabrio (Mom's) 1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!) |
#6
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"Are you serious? Hitting a puddle of water can warp the rotor."
You bet it is. I had brand new rotors warp on me with less than 1000 miles. I complained to MB about it and, after some discussions, they replaced them. The MB rotors are not ventilated (300E) and are prone to heating/warping. They are inexpensive but...
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Reno '93 300E 4Matic '98 Nissan Altima '00 Yamaha Road Star Silverado |
#7
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Did you torque the lug nuts properly?
In the old days you could tighten them right down and it didn't seem to effect anything, now a days with everything being lighter and thinner torque is very important. Sometimes you can get away with just re-torqueing them, if that doesn't work do a run out check on the rotors, no sense turning all the new rotors if just one or two are causing the problem. Tox! |
#8
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after putting new tires on mine , my brake pulsing problem reduced considerbly; could be just your tires need balancing etc., or inflating them to proper pressure. Its the old "is there gas in your car?" first step of diagnosis...
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#9
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Also, another common way to warp them is too get them really hot through use and then run your car through a car wash or get water on them while you are washing the car. Rotors do not like to get wet when they are hot.
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Ali Al-Chalabi 2001 CLK55 1999 Dodge Ram 2500 Cummins Diesel 2002 Harley-Davidson Fatboy Merlin Extralight w/ Campy Record |
#10
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Quote:
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#11
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Not sure what type of brake pads your using but a miss-match of pads and rotor could contribute (in other words the composition of your brake bads could create too much heat). Warped rotors is generally a heat thing.
Good luck, Joel |
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