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 ....

cindyclk

just asking...was the brake switch oem from dealer or ebay?

I would swap another one before going too far...cheap $15 try.

sz01361

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?

A1EK

Needs to be Merc brake switch, ive had problems with non-merc brake switches

1mbenz99

I had the same problem, I changed the steering angle sensor & the brake switch(OEM). Problem solved

sz01361

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.