Hi all, I have a 2006 E320 CDI with aprox 88K. I have just noticed that the breaks pulse a little when I break. I had the rotars looked at and there was a very little rust which was machined off -- It was fine for a few hundred miles and now it seems to be back

Does anyone know about a recall that was for some break module on this car? Is there a web site that I can visit that would give me some direction.

Thanks and to all MERRY CHRISTMAS

3pointstar

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I had the same thing on my CDI, after the rotor were machened they only last 5k miles or so...I bought new rotors and pads that solved the problem 30k plus mikes later perfect!
Recall had nothing to do with brakes pulsing.

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1987 300D
2005 E320 CDI

Front rotors are ventilated discs. As the rotors wear they are more easily deformed between the rotor ventilation "blades" - the brake pad pressure and heat cause these surfaces to bow into the air flow channels making the surface wavy. When you machined them you merely cut down the material on the discs over these "blades" and made it even with the disc surfaces between the "blades." Now even thinner, the effect reoccurs. The front discs on these cars should be replaced with the pads. They come off easily and are actually pretty cheap.

Jim

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Own:
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

Owned:
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)

X2 with Jim,
Modern ventilated disks have to be treated with caution. Its not worth machining them. All you will do is increase the risk of a crack & a potential lock up. I have seen a disk that had a wedge crack right out & the wheel lock. Its not nice at all.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

I was pricing rotors and brake pads for this car on this website out of curiosity when I saw a warning by the parts that you have to disable the braking system with some kind of computer before changing the brake pads because serious injury could result? Is this true? Can the home mechanic no longer change brakes himself on these newer diesels?

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

Here's the warning:

"SBC brake system MUST be deactivated using SBD 102 or Mercedes Star Diagnosis tool. When activated, the SBC brake system builds up high pressure in the brake system. The automatic extension of the caliper pistons may result in serious bodily injury. Brake pressure may cause brake fluid to escape at high pressure, with possible resulting damage or injury. Maintenance or repair work must never be performed on an active SBC brake sustem. The SBC brake system pushes out the brake master cylinder when:;"

So what's the home mechanic to do?

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

Disconnect the BIG electrical connector at the SBC pump.

Even then, don't open/close any doors while working on brakes.

But really the days are gone when the "home mechanic" just dives in with few to no tools.

Don't even attempt an oil change on a modern Mercedes without reference to factory procedures.

http://www.startekinfo.com/StarTek/outside/11498/?requestedDocId=11498

For example, when you replace rotors, you also replace all the bolts you remove, i.e. don't reuse them.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

Thanks for the link. As these cars are now dropping into the teens I think we will see more DIY types on this forum picking them up. It would be nice to have some type of DIY articles for basic procedures like oil changes, brakes, etc. The apparent complexity is, however, incredible. It looks like service manuals are a must for anyone.

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)