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I have an ML 350 Bluetch and after coming back from a holiday, the car started giving me erratic dash warning lights.
- Presafe function inoperable
- ABS
- ESP
- Parking Break
- Without Gear Selection
- CEL
- Airbag light
Pretty much everything flashing as I drive. Sometimes the dash will completely die and come back after a while, I can also feel the electronic assist on the steering wheel not working as well. I can also really feel the gears changing and sometimes it will not go between P, N, R, D.
I have had the car for almost 2 years and it has been serviced mostly at MB and one time at a reputable indy that registered the service with Mercedes as well. It was working absolutely fine until now, it was parked on my driveway with temperatures 0 - 10 degrees celsius for 3 weeks in Scotland.
Something is causing the computer to go crazy but I don't know where to start...
I have an ML 350 Bluetch and after coming back from a holiday, the car started giving me erratic dash warning lights.
- Presafe function inoperable
- ABS
- ESP
- Parking Break
- Without Gear Selection
- CEL
- Airbag light
Pretty much everything flashing as I drive. Sometimes the dash will completely die and come back after a while, I can also feel the electronic assist on the steering wheel not working as well. I can also really feel the gears changing and sometimes it will not go between P, N, R, D.
I have had the car for almost 2 years and it has been serviced mostly at MB and one time at a reputable indy that registered the service with Mercedes as well. It was working absolutely fine until now, it was parked on my driveway with temperatures 0 - 10 degrees celsius for 3 weeks in Scotland.
Something is causing the computer to go crazy but I don't know where to start...
The same thing happened to me around 115k km. I have uploaded a video on YouTube. In my case, it turned out it was the blind spot sensors located in threar bumper that messed up the electrical system. Every detail is in the thread that I linked. Hopefully, it's the same issue.
Hi, thanks for linking this. Mine has the same symptoms but does not have a blind spot function.
Today I drove it again and for a while, it had no warnings but I noticed that it was the PRE-SAFE Function one that came on first before the rest started to go erratic again. Did yours show during scanning?
Do you maybe know what PRE-SAFE functions are?
I have the car booked to be scanned but I am trying to understand the issue as well.
2013 ML350 Bluetec, 1966 Ford Mustang Convertible (sold)
Originally Posted by Ramaya
Hi, thanks for linking this. Mine has the same symptoms but does not have a blind spot function.
Today I drove it again and for a while, it had no warnings but I noticed that it was the PRE-SAFE Function one that came on first before the rest started to go erratic again. Did yours show during scanning?
Do you maybe know what PRE-SAFE functions are?
I have the car booked to be scanned but I am trying to understand the issue as well.
I don't have a scanner. It was still under CPO warranty so the dealership fixed it. I'm currently at 242 000 km and having the pre safe function issue as well. No other CEL or messages. The only thing not working is the front collision assist. Everything else is fine. Wish I could help you more.
Hi, thanks for linking this. Mine has the same symptoms but does not have a blind spot function.
Today I drove it again and for a while, it had no warnings but I noticed that it was the PRE-SAFE Function one that came on first before the rest started to go erratic again. Did yours show during scanning?
Do you maybe know what PRE-SAFE functions are?
I have the car booked to be scanned but I am trying to understand the issue as well.
ive also seen that message pop up on mine, but for me it was also due to an issue with a blind spot sensor.
If you dont have blind spot sensors my guess would be some other sensor or electrical issue, maybe parking sensors if you have them? iirc the harnes connecting to my blind spot sensor was either the same one going to my parkins sensors or it was at least attached to the harness going to the parking sensors.
. While driving, some few light will pop on my dashboard and the AC, radio, trafication light, rare light, glass would stop working and sometimes it will come up by itself and sometimes it won’t! Pls I need help, I am so bothered about this for a long time now
. While driving, some few light will pop on my dashboard and the AC, radio, trafication light, rare light, glass would stop working and sometimes it will come up by itself and sometimes it won’t! Pls I need help, I am so bothered about this for a long time now
This is common for cars with a broken blind spot sensor. The weather seal on the sensor ages and allows water and dirt to get in. The water and dirt then shorts/grounds the CANBUS signal wires together, causing problems to the rest of the car. This would eventually just turn the entire car into a brick. To test: disconnect the harness for the rear parking distance sensors and blind spot sensors. It is behind the rear left wheel in the bumper skin. If the symptom goes away, you should then replace that entire harness and whichever blind spot sensor that's cracked open.
01-12-2022, 02:06 PM
