Glow plug controller.

[JamesPGUK]

Does anyone have the part number for a Dec 2014 Mercedes c class estate. 651 engine. Struggling to find part number online where's best place to find parts from reg plate?

in summer glow plug light came on a few seconds after starting. I’m assuming it’s the controller? Car starts in the cold but rough then light comes on. Is this common?

 

[Smart320]

Could just be one or more Glowplugs and / or the controller . Had a plug go and the controller at the same time on my ML. Getting it on Star will tell you exactly what's wrong

 

[m80]

I would expect your controller to be ok from the indications you get.

A gp going short cct could take the controller with it.
I would do a simple multimeter test on the gp's.
Open cct means goosed and needs replacing,
a dead short may well mean gp and controller replacement,
low ohms reading and the gp is ok.

Changing all in one go makes sense though.

 

[JamesPGUK]

Thanks chaps

 

[Knightrider2691]

I would expect your controller to be ok from the indications you get.

A gp going short cct could take the controller with it.
I would do a simple multimeter test on the gp's.
Open cct means goosed and needs replacing,
a dead short may well mean gp and controller replacement,
low ohms reading and the gp is ok.

Changing all in one go makes sense though.

If this is not fixed what are the potential repercussions? My glow plug light stays on for a few seconds when I start from cold. Thanks

Sent from my H3113 using Tapatalk

 

[OneForTheRoad]

If this is not fixed what are the potential repercussions? My glow plug light stays on for a few seconds when I start from cold. Thanks

Sent from my H3113 using Tapatalk

Harder cold starts.

 

[Deleted member 149005]

I was told to wait until the GP light was out before starting. Is this no longer the case?

 

[alecmascot]

I was told to wait until the GP light was out before starting. Is this no longer the case?

It's good practice for a prompt start when it is below 0.

 

[JamesPGUK]

Hi thanks for reply. Just been on Star and looks like control module because it suggest all 4 plugs out.

I see your point it starts so why change. With recent frost starting really rough (rocking car) and had to wait for a min to settle down.

Anyone know the part number for the module? 651 engine Dec 2014 c class estate 2.2

 

[JamesPGUK]

It's good practice for a prompt start when it is below 0.

light only comes on after start.

 

[alecmascot]

light only comes on after start.

It's broke then.....
Measure the GP resistance with a meter and if they are ok then change the controller.

 

[m80]

If all else is good it would need to be pretty cold to affect the start. Generally we're ok in the UK.
It does affect emissions though I beleive.

But as said check your GP's resistance.
Can these be checked at the controller by unpluging there, anyone?

 

[JamesPGUK]

Resistance checked and all good. For sure it’s the controller anyone know the part number?

 

[alecmascot]

Resistance checked and all good. For sure it’s the controller anyone know the part number?

On a OM651 it is right at the front of the engine.
You should be able to read the PN from it !!

 

[JamesPGUK]

On a OM651 it is right at the front of the engine.
You should be able to read the PN from it !!

brilliant, will look tonight thanks

 

[JamesPGUK]

brilliant, will look tonight thanks

Ok part number is
A 6519005602 seems to fit more than one model. Will purchase and feedback result.

 

[JamesPGUK]