Glow plug relay. Which one

[Markssl]

I need to buy a new relay. Loads on EBay.
I called a Merc specialist who tells me there are two types one for steel glow plugs and one for ceramic glow plugs. I can get a Beru one for about £100. Merc want £195. Or I can get a relay and plug set.

Any advice please?


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[Lit91]

I'm pretty sure that all of the MB / Beru relays will be the same, with the only difference being in the old and new superseded version (which you have pictured).

 

[Markssl]

I thought they were both the same in the pics. GSE114. No?
Which one is the superseded one pls?


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[Lit91]

I thought they were both the same in the pics. GSE114. No?
Which one is the superseded one pls?


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Both of the ones in your pics are the same, they are the new version. The old one is more of a square block, considerably larger in size.

 

[Markssl]

Both of the ones in your pics are the same, they are the new version. The old one is more of a square block, considerably larger in size.

Thanks. My car is a 10/08 so it will be the newer one.


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[Lit91]

Not sure on when they have started fitting the new ones, but the old ones seem to be very unreliable. The new unit replaces the old one as plug & play.

 

[Auto-mobile]

Not had to replace the superseded relay for failure, are ou sure you don't have the old type fitted?

Just to add you won't have the ceramic glow plugs fitted your engine so either in the pictures are fine.

 

[Markssl]

My car is the oct 08 with v6 3.0. I should imagine it's the later one. I've bought a GSE114 from Germany. I've already got new glow plugs so hopefully I'm sorted.
Thanks


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[expandyman]

I brought a new style Beru relay of eBay for sub 100. Easy to fit and solved an issue.

 

[Markssl]

Fitted my new Beru relay today. Not tried it from stone cold yet. Fingers crossed it works!
The one that came off looked nothing like the new one. Here's some pics

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[Auto-mobile]

That's the old style one that fails.

 

[Markssl]

Thanks for your help. It's all a bit mind boggling. My cars on 199k miles I'm wondering what's the next part to go wrong!!


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[peterboat]

According to my scanner glowplugs 5 and 6 have gone down on my mates w211 its a bad starter from cold taking about 6 attempts before starting with clouds of white smoke after that its first time every time. I would have thought with just 2 plugs down it would still start so I am suspecting a relay fault as well, any thoughts on this anybody?

 

[Auto-mobile]

According to my scanner glowplugs 5 and 6 have gone down on my mates w211 its a bad starter from cold taking about 6 attempts before starting with clouds of white smoke after that its first time every time. I would have thought with just 2 plugs down it would still start so I am suspecting a relay fault as well, any thoughts on this anybody?

Check the fault codes on the car and check the glow plugs with a multimeter.

 

[Markssl]

According to my scanner glowplugs 5 and 6 have gone down on my mates w211 its a bad starter from cold taking about 6 attempts before starting with clouds of white smoke after that its first time every time. I would have thought with just 2 plugs down it would still start so I am suspecting a relay fault as well, any thoughts on this anybody?

I noticed with mine If it was a glow plug problem the warning light stayed on. If it's the relay and the gp's are ok the light extinguishes as normal. Either problem the car is a pig to start from cold!
I bought my relay off eBay.

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[avoidme]

According to my scanner glowplugs 5 and 6 have gone down on my mates w211 its a bad starter from cold taking about 6 attempts before starting with clouds of white smoke after that its first time every time. I would have thought with just 2 plugs down it would still start so I am suspecting a relay fault as well, any thoughts on this anybody?

Check them all with a simple test light. They are very low resistance internally,
going with the test light to the battery+ and then touching the tip of the glowplug your test light should light, otherwise bad plug

 

[Lit91]

I noticed with mine If it was a glow plug problem the warning light stayed on. If it's the relay and the gp's are ok the light extinguishes as normal. Either problem the car is a pig to start from cold!
I bought my relay off eBay.

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The old relay doesn't show any signs at all, in fact, when changing to the new one, it is likely that the glow plug light would stay on, as it would identify faulty glow plugs also.

You thought you had the new type of relay on a 2008, just seen a similar thread on the other forum, with a c207 2010 which was still fitted with the old unit from the factory.

 

[Markssl]

The old relay doesn't show any signs at all, in fact, when changing to the new one, it is likely that the glow plug light would stay on, as it would identify faulty glow plugs also.



You thought you had the new type of relay on a 2008, just seen a similar thread on the other forum, with a c207 2010 which was still fitted with the old unit from the factory.

You're right. No signs at all.
It's now starting perfectly. I had new glow plugs last year.


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[Lit91]

You're right. No signs at all.
It's now starting perfectly. I had new glow plugs last year.


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It has lasted for some 190k miles, which is a result in itself, they usually fail much sooner.