A180 (2016) 1.5 Diesel - Auto - Engine Preglow Dashboard Light solid ON

[Ricki Divetta]

Hi, I was driving home from work & noticed almost immediately I pulled off that the Preglow Dashboard illumination had remained on & solid (not flashing). I drove approx. 1 mile down the road, away from work & stopped the car. I restarted it & it remained illuminated. I revved the engine (in Park mode) & it topped out at 3000rpm. I then drove home (10 miles) & it remained illuminated for the whole journey.

Does anyone know what the cause of this may be? What should I do (apart from the obvious - take to a mechanic)?

Warranty expired in May (during Covid-19) pandemic so all service centres were / are closed.

Thanks,
Ricki

 

[bertb1]

Your clutching at straws unless you have the car read for codes

 

[V6Matty]

Glowplug light on all the time means one or more have gone open circuit, you do need to read the codes though to find which one but also rule out that’s it’s not faulty wiring

 

[EmilysDad]

Glowplug light on all the time means one or more have gone open circuit, you do need to read the codes though to find which one but also rule out that’s it’s not faulty wiring

A multimeter set to Ohms will also tell you which plug is goosed
STAR told me that No 5 plug on my R Class was fubar'd when it was the relay

 

[V6Matty]

A multimeter set to Ohms will also tell you which plug is goosed
STAR told me that No 5 plug on my R Class was fubar'd when it was the relay

Good point, though last time I did a test on star it said number 3 was gone but checking the values I could see it was but also number two relay was on its way out

 

[Ricki Divetta]

hi all, unfortunately i do not know what STAR is or how to test a glow plug to see if it is faulty??

I have however had a colleague at work plug his diagnostic tester into the car & the following fault came up:-

P0380
Glow Plug/Heater Circuit A

Does anyone know what this means??

He then reset this diagnostic code & re-run the test. No fault codes were now active & when ignition turned on, the glow plug warning light had gone out. He said to keep an eye on it for a bit to see what happens or if it occurs again.

Thanks,
Ricki

 

[Ricki Divetta]

When I started the car this morning, the light came back on & stayed illuminated. My colleague says I need to check the glow plug circuit, connections, any fuses, relays etc.

Can anyone help with what I need in a bit more detail, where I can find what needs checking, which fuses etc?

Thanks
Ricki

 

[EmilysDad]

When I started the car this morning, the light came back on & stayed illuminated. My colleague says I need to check the glow plug circuit, connections, any fuses, relays etc.

Can anyone help with what I need in a bit more detail, where I can find what needs checking, which fuses etc?

Thanks
Ricki

The light is telling you that one of the glow plugs has failed. Could also be the relay that's failed

 

[Ricki Divetta]

Hi, can anyone advise on things to check at home with locations of equipment & what to test for. Just want to see if I can diagnose & rectify without the spend of taking it to a mechanic, MB or not!!

Thanks
Ricki

 

[ThePianist]

All, I'm a first time Mercedes owner of a 2015 A180d model with OM607-C engine. Back in July in less than 24h after I bought, the engine won't start. There's no cranking noise, i.e. the starter doesn't engage the engine. I've found a way to start the engine eventually, however, the preglow indicator lamp is always on.
Here are the error codes logged:
P08106 was logged first, followed by P1BAC4 then P1BEB3 then multiple P84003 were logged and a last P08106 was logged.
The garage identified glow plug for cylinder 3 as the culprit and confirmed they've changed it and had no issues starting the engine since July until yesterday when the weather dropped to 13 Celsius degrees and the glow plugs were engaged to do their job (heat the diesel). I've got the exact same issue again.
Can the kind people who are expirienced in this forum help me with the following:
1. Is there a way to clean all the engine faults without a OBD nor removing the battery completely?
2. Could this be a corner case for a memory corruption in the software which occurs only when the glow plugs need to be used? I.e. I can change all the glo plugs and still have the same issue at some point - after let's say 60 engine starts and temperature is under 15C?
3. How can I check what are the latest versions of all software components for this model without taking it to the dealer - BWM gives you all access online while Mercedes this model doesn't support the phone app, however, I've registered the car online with Mercedes and I'm still unable to see the latest maintenance software versions for this model?
Thank you in advance,