active lane keeping assist inoperative, DTR+ steering assist inoperative, active blindspot assist inoperative

[darren1001]

I have a W212-002 (2013).

I have the following faults appearing on the dash (not now an intermittent fault like it used to be)
active lane keeping assist inoperative,
DTR+ steering assist inoperative,
active blindspot assist inoperative

Switch off engine and leave for 15mins, then restart the car no longer works

diagnostic is:
U118300 (historic) The diagnostic CAN network management is unstable
755000 (current) Chassis CAN bus: One or more signals sent from control module 'Central gateway' via the CAN bus is unreasonable

re the Central gateway (CGW/ZGW):
P061000 (historic). The coding of the control module is incorrect

The trafficators (turn signals) stop working quite regularly but only when the above warnings are displayed on the dash, and even then only after several minutes, (intermittent fault):
B178F00 (historic) Switch 'Turn signal' has a malfunction

Have had the car from new and previously replaced the RHS driver's side rear radar (A0009058702) which seemed fixed a similar problem for a few years

I was be so grateful is somebody might offer some insight into how to fix

@rorywquin am aware you've suffered similar problems yourself

 

[dry run]

Have you checked the condition of your battery? Mine started throwing intermittent faults when the battery got old (but was still showing 12.1V with the car switched off).

Sorry, but anything beyond that is way above my pay grade

 

[darren1001]

Have you checked the condition of your battery? Mine started throwing intermittent faults when the battery got old (but was still showing 12.1V with the car switched off).

Sorry, but anything beyond that is way above my pay grade

thanks will take a look - would that be the crank battery, rather than the smaller battery in the boot? Thanks again

 

[ajlsl600]

I believe he is referring to consumer battery.

 

[darren1001]

I believe he is referring to consumer battery.

Thanks that would make sense. Also, I changed the crank (engine starter) battery in 2019 so it should have some life left in it yet.

Will check the consumer battery in the boot

 

[darren1001]

Thanks that would make sense. Also, I changed the crank (engine starter) battery in 2019 so it should have some life left in it yet.

Will check the consumer battery in the boot

Well, the consumer battery is showing 13.1 V with the car completely off.

It’s showing 13.22 V with the car running. The error messages appear straight away in the dash when the engine is started. Checked the calibration of my multimeter also

 

[darren1001]

Well, the consumer battery is showing 13.1 V with the car completely off.

It’s showing 13.22 V with the car running. The error messages appear straight away in the dash when the engine is started. Checked the calibration of my multimeter also

It’s showing 13.2V with the key at position two (coil on)

 

[rorywquin]

I had something similar in my SL.

Started with “blind spot assist” problems, then “active brake assist not operative”.

Spoke to the indie who does my wife’s car and failure of the radar units (~£300-00 each + labour) is a common problem. Corrosion on the contacts (new wiring loom?) can also be an issue. I went down the route of replacing a battery. Didn’t work.

I always said that once the car started giving me problems I’d sell it, which I did.

 

[darren1001]

I had something similar in my SL. Spoke to the indie who does my wife’s car and failure of the radar units (~£300-00 each + labour) is a common problem. Corrosion on the contacts (new wiring loom?) can also be an issue. I went down the route of replacing a battery. Didn’t work.

Thanks. Would you be able to let me have his contact details?

At least the fault I have nowadays not an intermittent one

 

[rorywquin]

Thanks. Would you be able to let me have his contact details?

At least the fault I have nowadays not an intermittent one

He is near York. Richard Hollings.

Richard Hollings Auto Services - Mercedes Benz Independent Specialist, York

York’s Independent Mercedes Benz specialist. With a combined experience in excess of 40 years, servicing and repairing Mercedes Benz cars, we believe we deliver a comparable service with that of main Mercedes dealers. Priding ourselves in a one to one customer service experience.

www.rhautoservices.co.uk

 

[darren1001]

Update (might be useful). As is cited as a frequent cause, the fault became more regular than intermittent while in a serious downpour on the motorway. So now after standing on my drive or several days to dry out, I drive the car for 10minutes (3.7 miles ), and the faults show. I wait for 30minutes obv. with a coffee, and the car starts without faults. It’s now running again without faults. Will need to avoid puddles I guess. Unfortunately I can’t always avoid downpours

Maybe a hairdryer under the rear side bumpers

 

[rorywquin]

Update (might be useful). As is cited as a frequent cause, the fault became more regular than intermittent while in a serious downpour on the motorway. So now after standing on my drive or several days to dry out, I drive the car for 10minutes (3.7 miles ), and the faults show. I wait for 30minutes obv. with a coffee, and the car starts without faults. It’s now running again without faults. Will need to avoid puddles I guess. Unfortunately I can’t always avoid downpours

Maybe a hairdryer under the rear side bumpers

It will get worse. That is how it started on my SL.

 

[darren1001]

It will get worse. That is how it started on my SL.

Will update this thread when the saga starts up again

 

[ajlsl600]

Mb, s are great at collecting unwanted water, footwells, boots, rear lights ect. I think they miss a point. If I wanted water in my car, I wud buy one without a roof.!! Hope op gets a solution.

 

[darren1001]

Mud flaps. All’s still working properly atm (have not driven in big rain since sensor-gate). I looked at the design of the rear wheel arch and at the location of the blind spot sensors, will now fit rear wheel mud flaps

 

[Blobcat]

Mud flaps. All’s still working properly atm (have not driven in big rain since sensor-gate). I lokked at the design of the rear wheel arch and at the location of the blind spot sensors, will now fit rear wheel mud flaps

They will increase your fuel consumption, which may or may not be an issue for you

 

[rorywquin]

Mud flaps. All’s still working properly atm (have not driven in big rain since sensor-gate). I looked at the design of the rear wheel arch and at the location of the blind spot sensors, will now fit rear wheel mud flaps

Anything effective will possibly spoil the look of the car.

The SL had little rinky dink flaps about 1” long.

 

[darren1001]

maybe a pair of these - they look wide enough..

 

[rorywquin]

Pair of these?

However while I was looking for this pic I came across several with silhouettes of very large ladies which may be more representative these days.

 

[darren1001]

I suppose if you were looking for that particular pic, it must have etched into your memory bank, and be your dream mud flap, so I can't really compete