All the lights Mercedes CLA 220d

[Scobra]

Hey everyone,

First time post so hope this is ok.

I have a 2016 Mercedes CLA 220d. Just recently I have had an intermittent fault which is becoming more regular (every drive). I start by getting a warning around parking pilot inoperative, then parking brake, then power steering (power steering stops working) then multiple messages (tyre sensor inoperative, abs, traction control) I honestly don’t think there is another light or warning which can come on !

Then the dials all go a little crazy (no revs, no speed, oil and fuel gauge drop to zero). The window wipers even come on !

It comes and goes.

Weird thing is the car runs fine. I’ve just recently had the I take manifold replaced.

I’ll share some photos but any insight is welcome.

Thanks again.

I did try to search but with so many faults I was struggling to find a specific thread.

 

[AMGeed]

Get the voltage checked on your main battery and auxiliary battery if you have one.
Low voltage on Mercedes seems to cause many spurious faults that disappear with a fully charged battery.

 

[Scobra]

Sorry to bump this thread again…

I’ve checked aux battery (under passenger footwell) voltage and load check all ok.

Checked main battery, was goosed so got a new one today.

Problem remains

Intermittent and only happens after driving for 10+ mins.

Not everytime, but more often than not.

Just if anyone has any further ideas or thoughts.

 

[AMGeed]

Sounds like its time for a visit to a good Mercedes specialist to determine what's going on.
If you post your location possibly someone can recommend a specialist. I'd avoid the main dealer simply because of the horrific labour rates for diagnosis.
A mercedes specialist should have Star diagnostics which helps identify the issue.

 

[Scobra]

Thanks mate.

I’m based Motherwell, happy to visit any recommendations in Glasgow or surrounding areas.

So frustrating

That’s an inlet manifold, new brakes, battery and window regulator all in 8 weeks.

Cars been flawless up until now in 7 years of ownership.

 

[malcolm E53 AMG]

I’d look at all the car earthing points a bad earth can throw up all kinds of problems

 

[mioba]

Have these issues started after the above work - something disturbed maybe.
Go through the engine bay and check all cabling is routed properly and connections are well seated.

I can imagine some electrics have been moved to get to the inlet manifold.

 

[Scobra]

No breakthrough yet.

Going into a Mercedes specialist local to me on Monday.

Checked earths etc, nothing . Getting a sensor fault for the air con out with when the lights go crazy. Checked the sensor and a bit dirty but no signs of liquid etc.

Was happening even before the inlet manifold. Had a faulty window regulator replaced and it happened before that too.

I’m at my wits end with this car over the last 8 weeks . Over £2k spent after years of flawless ownership

 

[Scobra]

This is the fault which comes up quite regularly and has done for a few weeks.

Would this cause the issues I’m describing ?

 

[rich.g.williams]

This has an electrical feel to it, a loose connector, a bad relay, a loose battery lead somewhere loose connector to fuse box (SAM unit) and always the chance of water ingress messing things around, then there's the ignition switch maybe.

suggestion - turn the panel light on and check if its flickering when all this happens (that said LED lamps don't tend to flicker like the old filament lamps)