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Old 10-14-2001, 11:19 AM
Mike Stone
Posts: n/a
Question Brake Snatch

I have a E320 Wagon year 2000 Model
When I drive it from cold, the last instant before stopping when braking, causes a kind of snatch that makes a very dull "Thud" sound.
Difficult to explain but it is rather like I have stabbed at the pedal when doing 1 mph.
As soon as car has done some distance and brakes warmed up everything is normal.
Car has only done 36k miles.
I have checked Pads. Genuine MB (Only 30% worn). Rotors are almost unmarked.

I have also gone to unused car park and tried different techniques for braking to a stop at slow speed. Same result.

Dealer, after checking car, says this is fairly normal with cold pads - rotors.

Anyone any advice
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Old 10-15-2001, 03:29 PM
G-Benz's Avatar
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
My 300E does that too! I have a slight incline out of the driveway in the morning, and when I coast down and press the brake, I get an additional "clunk" with a noticeable added pedal travel.

Did it since I purchsed it three years ago (@ 72K). Service tech said all is normal, and the problem hasn't worsened. Brake pads have been serviced twice over the course of my ownership, but the "clunk" is still there.

I'm not about to worry about it, unless the "clunk" is followed by other little metallic sounds of brake parts rolling down the driveway...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car
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Old 10-15-2001, 03:52 PM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596
I have encountered the same effect and found I could make it happen at will creeping down the driveway with the brakes cold. It is as if the pad to disc coefficient of friction is not stable, and it gets into a "stick-slip" effect, like a prop shaft on a ship running at near zero rpm.

In my 350SD I can get the brake force just right and have the automatic transmission push the car at a few inches per second and hold the brake so that the noise is virtually constant.

All that is amusing, but likely not a problem. I have put 100,000 miles on the car and not had any troubles with the brakes. Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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