Random error messages on board keep appearing
Thread Starter
Newbie
Joined: Nov 2022
Posts: 9
Likes: 2
Class A
Random error messages on board keep appearing
Hi all,
I have a problem with my Class A, 2014. It happened few times now, when I am driving I start getting 'PRE-SAFE Functions limited' message. Then suddenly, I start getting all errors randomly : EPS inoperative, park assist inoperative, Active bonnet inoperative, Park Break inoperative etc...Also the car starts to suddenly act unresponsive, sensors start flashing, whenever I put turn signal (left or right) I should put them multiple times in order to function, switching from D to R becomes irresponsive also and I should do it multiple times to function....
If I turn my car off, it won't turn on again. If I leave it for a day or 2, it works again very normal ! Then suddenly the exact same happens again. I visited the garage which passed the obd tests and they got no fault codes!
For info, whenever I try to turn the car on the message 'Anti-theft protection activated' appears. And I get 'Risk of rolling error...'.
It seems that the car is displaying all the errors on screen randomly...
Any idea what this could be? and how to approach this ?
Thanks!
I have a problem with my Class A, 2014. It happened few times now, when I am driving I start getting 'PRE-SAFE Functions limited' message. Then suddenly, I start getting all errors randomly : EPS inoperative, park assist inoperative, Active bonnet inoperative, Park Break inoperative etc...Also the car starts to suddenly act unresponsive, sensors start flashing, whenever I put turn signal (left or right) I should put them multiple times in order to function, switching from D to R becomes irresponsive also and I should do it multiple times to function....
If I turn my car off, it won't turn on again. If I leave it for a day or 2, it works again very normal ! Then suddenly the exact same happens again. I visited the garage which passed the obd tests and they got no fault codes!
For info, whenever I try to turn the car on the message 'Anti-theft protection activated' appears. And I get 'Risk of rolling error...'.
It seems that the car is displaying all the errors on screen randomly...
Any idea what this could be? and how to approach this ?
Thanks!
MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,229
Likes: 188
From: Toronto
2022 E53 AMG
First.. Wrong thread. Second the shop you used does not seem to have to correct software to check the car.
I can tell that you are having a power related issue. Firstly, have you charging system checked as it could be the alternator. If the alternator is okay then it's time to change your battery... don't cheap out, get the best battery.
I can tell that you are having a power related issue. Firstly, have you charging system checked as it could be the alternator. If the alternator is okay then it's time to change your battery... don't cheap out, get the best battery.
Thread Starter
Newbie
Joined: Nov 2022
Posts: 9
Likes: 2
Class A
First.. Wrong thread. Second the shop you used does not seem to have to correct software to check the car.
I can tell that you are having a power related issue. Firstly, have you charging system checked as it could be the alternator. If the alternator is okay then it's time to change your battery... don't cheap out, get the best battery.
I can tell that you are having a power related issue. Firstly, have you charging system checked as it could be the alternator. If the alternator is okay then it's time to change your battery... don't cheap out, get the best battery.
We actually managed to finally pull the codes. Please find below:
MBWorld God!
Joined: Dec 2019
Posts: 33,211
Likes: 6,597
As mentioned, most lost communication fault codes have to due with a weak battery. At least in most cases. Check both main 12V battery and auxiliary battery.
Thread Starter
Newbie
Joined: Nov 2022
Posts: 9
Likes: 2
Class A
They say it's the ECU that is faulty and has to be replaced... I'm really confused and not sure about that.. Is what they're saying logical?
Thread Starter
Newbie
Joined: Nov 2022
Posts: 9
Likes: 2
Class A
