DarloDunk
New Member
Sorry guys but yes, here we go with this old chestnut again!
Bought a CLK 200 Kompressor 2002, it already had the ABS, BAS and ESP lights on. The garage said it would be a £15 fix, so I took the chance. And so the saga begins.
Read the forums, watched the You Tube videos and replaced the brake light switch. It didnt fix the problem. Called out a diagnostic guy, he reset the faults, I drove 5 yards the lights came back on. We went for a drive all 4 wheel sensors were giving data. The faults were all to do with low voltage.
I had the battery checked, it was a bit low on charge, although the static voltage and the voltage with alternator running were OK. Still I charged it up fully. No change.
Next stop independant Merc garage. Different Diagnostic, similar results. He checked the input voltages at the ABS module plug and all were OK. His conclusion was that there was an intermittent fault in the wiring loom or the ABS module was knacked.
On getting home, and knowing a bit about electronics, I decided to buy a voltmeter and check the resistance of the ABS loom to earth, having also bought a Merc wiring diagram. it was OK too.
I have a friend who is a mechanic and called on his help. We bled the brakes and whilst on the ramp checked the ABS rings at the rear (even though they gave correct data) they were OK, no cracks, we cleaned them. Noticed that one sensor seemed a little further away from the ring than the other?
Ordered an ABS module from Ebay.... when it arrived I was all excited until I realised that it was a different model, both end in 132, and I picked the wrong one! Sent that back and ordered the correct one for around £140.
Whilst waiting, I heard stories of after market brake light switches causing problems. So I ordered one from Merc. Funnily enough it was £13 for a genuine part, cheaper from Merc than Ebay! With fingers and toes crossed I fitted it.... Bugger, still the same.
Just to note that lights 9 out of 10 times come on straight away without the car moving. I dont need to say that the steering wheel, left and right trick didnt help.
here I am waiting for the ABS module to arrive, fingers and toes crossed, because if this doesnt fix it, Im running out of options. Other than the lights being on the car drives fine. I will update thread as I go along, with the hope that this will be the go to thread for anyone else with ABS, BAS and ESP problems.
Bought a CLK 200 Kompressor 2002, it already had the ABS, BAS and ESP lights on. The garage said it would be a £15 fix, so I took the chance. And so the saga begins.
Read the forums, watched the You Tube videos and replaced the brake light switch. It didnt fix the problem. Called out a diagnostic guy, he reset the faults, I drove 5 yards the lights came back on. We went for a drive all 4 wheel sensors were giving data. The faults were all to do with low voltage.
I had the battery checked, it was a bit low on charge, although the static voltage and the voltage with alternator running were OK. Still I charged it up fully. No change.
Next stop independant Merc garage. Different Diagnostic, similar results. He checked the input voltages at the ABS module plug and all were OK. His conclusion was that there was an intermittent fault in the wiring loom or the ABS module was knacked.
On getting home, and knowing a bit about electronics, I decided to buy a voltmeter and check the resistance of the ABS loom to earth, having also bought a Merc wiring diagram. it was OK too.
I have a friend who is a mechanic and called on his help. We bled the brakes and whilst on the ramp checked the ABS rings at the rear (even though they gave correct data) they were OK, no cracks, we cleaned them. Noticed that one sensor seemed a little further away from the ring than the other?
Ordered an ABS module from Ebay.... when it arrived I was all excited until I realised that it was a different model, both end in 132, and I picked the wrong one! Sent that back and ordered the correct one for around £140.
Whilst waiting, I heard stories of after market brake light switches causing problems. So I ordered one from Merc. Funnily enough it was £13 for a genuine part, cheaper from Merc than Ebay! With fingers and toes crossed I fitted it.... Bugger, still the same.
Just to note that lights 9 out of 10 times come on straight away without the car moving. I dont need to say that the steering wheel, left and right trick didnt help.
here I am waiting for the ABS module to arrive, fingers and toes crossed, because if this doesnt fix it, Im running out of options. Other than the lights being on the car drives fine. I will update thread as I go along, with the hope that this will be the go to thread for anyone else with ABS, BAS and ESP problems.
