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#16
11-09-2004, 02:56 PM
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One more point in the checking of the sensors is that they may check out good with the wheels straight. Try turning the wheels both sides and make the measurements. Intermintinent problems in the cables may be eliminated. Just a point to consider.
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SANDEEEP 89 300SEL 230,000Km 
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#17
11-09-2004, 03:48 PM
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Quote:
you wrote... "Interesting... http://pabaah.com/modules.php?name=News&file=article&sid=706 Could backfire for the Repubs, as Clinton could come back..." canada never has a say... eh?
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#18
11-09-2004, 05:44 PM
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ABS problem
One other possibility to consider, if the ABS warning light is either coming on during normal braking, or if you are getting ABS operation even during light braking on dry roads, etc.:
The pick-up of pulses from the ABS sensors on the front wheels can be disrupted or intermittent if the wheel bearings are not adjusted properly (too loose). I had my car in for front brake pads and new rotors, and when I got the car back the ABS warning light came on at the first application of the brakes. I took the car back, and the mechanic "isolated" the problem to the right side ABS sensor, and replace it. They said that they weren't sure how the ABS sensor got damaged, but they concluded that they must have done it during the rotor replacement. Only problem was that they problem came back. So, I start poking around myself, and discover that the wheel bearings aren't close to being adjusted properly, following the front rotor replacement. I tightened them up to spec., and the ABS problem went away. The play in the wheel bearing disrupted the spacing between the rotor and the sensor. Replacing the sensor with a new, clean one probably helped the sensitivity of the sensor a little, but the problem was the loose wheel bearing all along. Bob Schleicher 1991 420SEL, 174,000 miles
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#19
11-09-2004, 06:38 PM
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Oh, now I get it. A neo-con troll from the BW board. Should slap radunegru for sending you here. Don't bother posting any more "open discussion" stuff here, it's not welcome. We had an OD forum and came over to wreck your place. M B Shop is strictly technical. Not much "bling bling" kinda crap here either. Just good tech knowledge.
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John Shellenberg 1998 C230 "Black Betty" 240K http://img31.exs.cx/img31/4050/tophat6.gif Last edited by blackmercedes; 11-09-2004 at 06:46 PM.
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#20
11-09-2004, 08:29 PM
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This started out just trying to get some information on speed sensors
Can't believe we are getting into a tizzy. I believe the bearings I repacked and set are ok The sensors are probably bad or I hope there bad because I don't want to purchase new ones and still have the problem
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[B]Mike Y. 00 sl500 sport 88 560 sl (sold)
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#21
11-09-2004, 08:58 PM
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I agree with myanoch.
Keep it nice, follow the rules. That is why the open forum was removed, and I believe some people were banned. Going at each other does not help the problem, nor anyone of you 2. I was reading my manual, and it states that a pulsating brake pedal when starting to move (while having some pressure on the pedal) is sort of a self-test. My car does it often (6 years of ownership), when I first start the car in the mornings, specially if it is very humid.
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified
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#22
11-09-2004, 09:43 PM
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Why don't blackmercedes and icetray meet in the nearest mercedes parking lot and open up a can of wup-ass and see who comes out on top.
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#24
11-09-2004, 10:00 PM
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Go down a dirt road about 30mph and lock up the brakes. If the brakes lock up and slide the abs ain't working.
Last edited by 300sel(88); 11-09-2004 at 10:28 PM.
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#25
11-09-2004, 10:55 PM
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The same thing happens to my car each morning as well. I know my ABS works (as they activated this evening in a panic stop). I thought this is normal for the car. Like he ABS is going into stand by mode (for lack of a better term). Have we decided that this is not normal? My car as been doing this for as long as I can remember with no side effects as far as I can tell.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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#26
11-10-2004, 07:24 AM
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I can't believe I am confused on the answers.
Either there are a lot of cars out there doing a so called test mode ??? or there are a lot of pre 90's with speed sensors bad. If the unit is not working the ligh comes on the dash If the speed sesors are bad the light won't come on because the unit thinks the brakes are locking up. ( when there really not) If there is a intermitent break in a wire you get abs at times with no set pattern of failure Am I thinking correctly on this Plus the only test short of going to a dealer is a resistance check to see if the sensor is bad???? I can't believe there is an intermintent break in the wire and it cuts out every time I back down my driveway in the morning? but I can believe the sensor could be bad and the longer distance plus down hill cause it to act up. I was never a parts changer without defining the cause of the problem but in this case I may have to change my way. Again thanks for the help
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[B]Mike Y. 00 sl500 sport 88 560 sl (sold)
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#28
11-10-2004, 09:09 AM
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What is the exact specification for the tightening of the the wheel bearings in the front. Car is 300SEL 89.
My ABS light comes on on the first few feet of driving and I have just ignored the issue. Brakes were done in the front and maybe it is the distance of the sensor to the teeth. Need to check this.
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SANDEEEP 89 300SEL 230,000Km
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#29
11-10-2004, 09:38 AM
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Does everyones Light come on? Mine just does the pulse / standby thing at the exact same spot on the driveway each morning. As far as I can tell, it does not do it again through out the day (weird) and there is no light that comes on ever.
The plot thickens.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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#30
11-10-2004, 09:48 AM
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Mine does the pulsing first thing in the morning after going a few feet. It never did that before so something is wrong or is going to be wrong soon if we don't find the problem.
My guess is its the rear sensor. With the diff weeping and all the debris that goes past there it wouldn't suprise me if the thing is on its way out. If it threw a light I could check the code using my make shift code reader but it doesn't. It does it for about a couple of seconds sometimes accompanied by a springing sound (boooiiiiiiiiinnnng) and its done for the day. 
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