Can I disconnect my battery

[Dennis m]

Hi all, l took my 2013 CLS 350 cdi for a MOT yesterday. And I asked the garage to look at the blind spot assist that is not working. He plugged in the reader and up came a few faults one of which was front offside sensor malfunction. he asked if I wanted to delete the fault codes.
Well needles to say it did not make any difference but a load of other codes have now appeared and I am getting warning info not only saying about the blind spot but indicator malfunction (blinking fast), low beam malfunction. none of which wear there before
I am wondering if disconnecting the battery for ten minutes may help, but have heard that some cars don't like it.

Any help will be appreciated

 

[optimusprime]

I would not know .But dont do anything till your sure .

 

[renault12ts]

Try it...no harm will be done if it does not work. But...check if you need a radio code.

 

[DSM10000]

Disconnecting the battery should not cause any problems. although I doubt it will solve your problems.

If these faults appeared immediately after your garage worked on the car then take it back and ask them to explain this.

If you do disconnect the battery then you will need to re-set your windows and, if fitted, sunroof. You do this by opening and closing the windows / roof fully down and up 3 times so they re-learn their positions

 

[Dennis m]

Disconnecting the battery should not cause any problems. although I doubt it will solve your problems.

If these faults appeared immediately after your garage worked on the car then take it back and ask them to explain this.

If you do disconnect the battery then you will need to re-set your windows and, if fitted, sunroof. You do this by opening and closing the windows / roof fully down and up 3 times so they re-learn their positions

I was standing next to him when he did it and all he did was press the delete fault cods after asking me if that's what I wanted him to do. So I know he didn't do anything other then that. He couldn't say why it did what it did.

 

[DSM10000]

I was standing next to him when he did it and all he did was press the delete fault cods after asking me if that's what I wanted him to do. So I know he didn't do anything other then that. He couldn't say why it did what it did.

Then I suggest you need to find another garage that specialises in MB.

 

[wongl]

Wasn't there a recent thread where a faulty blind spot assist took out the CAN bus and caused all sort of errors to be randomly recorded?

 

[Dennis m]

That sounds interesting. One of the fault codes says “can bus front end malfunction”

 

[Dennis m]

Wasn't there a recent thread where a faulty blind spot assist took out the CAN bus and caused all sort of errors to be randomly recorded?

Thanks for the pointer. I now have a direction to head in.

cheers

 

[grober]

Does indeed sound like a "global fault" pulling down the canbus and flagging errors where there are none. Usual causes are wiring/connector faults or water ingress somewhere on the system.

 

[Octayne]

Hello Dennis m,

This is just for info only and you may have tried- it may help, it worked on another car of mine - NOT a Mercedes, which I am pleased to say I have just bought and is my first one! I disconnected the battery and 'sent it to earth' ... I touched the leads together for sixty seconds then reconnected. Afterwards the fault had gone.

 

[Dennis m]

Just been under the car, had the tray off all I can see concerted to the front bumper is the parking sensors.
Does anyone know where I can find a diagram of the front bumper with sensor attachments showing
Cheers

 

[55AMGCLK]

A low battery can cause a load of errors. Worth checking you have a good battery.

I may have missed this but unsure why you are trying to get to the parking sensors. The bumper will need to come off for this on most cars.

 

[Dennis m]

Hi, I’m not looking for the parking sensors I’m looking for the blind spot sensors on the front due to fault code reading.

 

[55AMGCLK]

Hi, I’m not looking for the parking sensors I’m looking for the blind spot sensors on the front due to fault code reading.

Got you, you can have a look at this site and should be able to find the diagram with the sensor on it.

parts catalog Car mercedes CHASSIS EUROPA, original catalog Car mercedes CHASSIS EUROPA, online catalog Car mercedes CHASSIS EUROPA, Car catalog Car mercedes CHASSIS EUROPA

 

[55AMGCLK]

This may help...

You are being redirected...

 

[Dennis m]

Well today I removed the front bumper and was amazed to see I have no front blind pot sensors at all nothing there, I can see where they would be but nothing! and there is no singe that there ever has been. no wiring harness and it doesn't look like the bumper has ever been removed before.
Can anyone explain this to me. Unless they are using the parking sensors to do the job.

I'm stumped

 

[55AMGCLK]

Did you read the article I posted earlier?

I thought and the article also suggests that the blind spot sensors are in the rear bumper.

 

[Dennis m]

All the information I can find says that there are sensors front and back. I have found the back ones but nothing in the front.if they’re not needed why am I getting an error code saying they’re in fault.
I understand Mercedes change the design of things on a daily basis so no two models are ever the same but I cannot find anything that gives blindspot recognition without sensors in the front.

 

[55AMGCLK]

I am aware of the radar sensors on the front of the car. My car has them and they are behind the MB sign on the grill. They do not have anything to do with blind spot assist and are for collision detection. I am not convinced that the car would have blind spot assist sensors at the front as they will be pointless in detecting cars coming from the sides and behind. If anything there may be additional sensors in the doors.

My suggestion would be that you get the car diagnosed with the MB SDS system if you have not done so already. That would take any guess work out and help pin point the issue.