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B-Electric - ABS, ESP, Parking Brake and Collision Prevention failure.
Hi!
I was hoping that some of you can help me. With some fault finding on som periodical faults on my MB.
I have a MB B-Electric B250e W242 (electric drive of W246).
Risently i have got several warnings at the same time. That I do belive come from the same fault.
This faults usaly comes after I have charged the car, and disaper again after a new start og a short drive.
When visiting MB dealer regarding this, they cant see any fault or fault codes on the system.
When I have not been there, when the faults are active.
Fault lights:
- Parking brake (red and yellow)
- the electronic barking brake are working
- Brake fault (yellow)
- the brakes are heavy, seems that brake amplifier is not working
- ESP and ESP off (yellow)
- not tested if this is working when fault is active
- ABS (yellow)
- the ABS is not working
Fault messages:
- Malfunction, Visit workshop
- ABS and ESP, currently unavailabale
- Parking brake, see manual
- Collision Prevention, Assist Plus inoperative
Also, the stearing is heavy, when the faults are pressents.
Anyone found the fault on this one?
i keep getting the same warnings on my B250e.
Some times I can drive 30min before it comes on and some times its lit from start.
Check battery voltage with engine off and on. Not sure what the voltage should be for electric powered cars, but for petrol power its minimum 11.7v engine off and 13.7v engine on. Anything less and you have a dying battery and or alternator that can play havoc with the modules that only need a small drop in voltage to go haywire.
Then scan the car for codes. One troublesome issue such as a speed sensor can then set off multiple other ones. For example, a faulty speed sensor will diable your crusie control and collision prevention system, as well as ABS, ESP, SRS etc. They are all linked. When one stops, others raise codes as they stop as well.
The codes will tell you if you have non communication and or voltage problems to deal with. In this case, Id be willing to bet that its a speed sensor that's triggered all the other codes from modules that rely on a speed reading to operate.
Fix the codes first and start at the input side such as speed, temperature etc, not the reactionary side such as Collision etc. The later uses inputs and its usually the inputs that throw things off. If your input data is out, you'll never fix the problem.
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