CLK-Class (W208) 1998-2002: CLK 200, CLK 230K, CLK 320, CLK 430 [Coupes & Cabriolets]

ABS ESP BAS error

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Old May 9, 2014 | 08:56 AM
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CLK230 W208
ABS ESP BAS error

I am experiencing the dreaded ABS BAS ESP error on my car. The thing is when i ignite my car the error doesn't appear right away. I would have driven until i reach around 20kmh then ABS, ESP follow up by BAS error (in order of sequence) appear. if I start the car without moving error doesnt appear.

Tried:
1. Replace Brake Light Switch
2. reset error by turning steering wheel left and right
3. Check fuse #2 on dashboard driver side. Other fuses also seems fine.

Next week I am going to try:
1. Re-seat Brake Switch light to make sure it is working properly
2. Measure battery. My battery is a bit old but I doubt issue lies here
3. Check steering sensor. Also doubt this is source of problem.
4. Wheel speed sensor. This is most likely since errors appear when i go over 20kmh.

Any other idea of what I should be checking? I will be hooking the car to Star machine also. Really hope this is not going to be an expensive fix ....
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Old May 9, 2014 | 07:00 PM
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just asking...was the brake switch oem from dealer or ebay?

I would swap another one before going too far...cheap $15 try.
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Old May 9, 2014 | 11:23 PM
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CLK230 W208
I think it is OEM..

is it still possible that the problem is on brake light switch even though the car starts without these error and brake light all functions normally?
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Old May 12, 2014 | 08:16 AM
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SL 350 R230 (3.7L with AMG Speedshift autobox)
Needs to be Merc brake switch, ive had problems with non-merc brake switches
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Old May 12, 2014 | 09:56 AM
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02 CLK430 Vert & 03 E500
Originally Posted by sz01361
I am experiencing the dreaded ABS BAS ESP error on my car. The thing is when i ignite my car the error doesn't appear right away. I would have driven until i reach around 20kmh then ABS, ESP follow up by BAS error (in order of sequence) appear. if I start the car without moving error doesnt appear.

Tried:
1. Replace Brake Light Switch
2. reset error by turning steering wheel left and right
3. Check fuse #2 on dashboard driver side. Other fuses also seems fine.

Next week I am going to try:
1. Re-seat Brake Switch light to make sure it is working properly
2. Measure battery. My battery is a bit old but I doubt issue lies here
3. Check steering sensor. Also doubt this is source of problem.
4. Wheel speed sensor. This is most likely since errors appear when i go over 20kmh.

Any other idea of what I should be checking? I will be hooking the car to Star machine also. Really hope this is not going to be an expensive fix ....
I had the same problem, I changed the steering angle sensor & the brake switch(OEM). Problem solved
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Old May 17, 2014 | 09:36 AM
  #6  
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CLK230 W208
Checked batter and re-seat brake switch yesterday. I also found Yaw sensor on my trunk unplugged. After plugged, we reset the error and BAS/ESP/ABS fault still displayed above 25km/h

Will try cleaning up wheel sensor and steering angle sensor on my next visit to the garage.
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