My local mechanic only managed to change 5 glow plugs, mercedes e class w211.

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mondotex

Member
Joined
Nov 16, 2023
Messages
42
Location
manchester
Car
Mercedes e class w211 e280 cdi saloon
Hi all.
I have done a diagnostic only 1 glow plug was working,
Main issue was misfire between 2500/3000rpm at full throttle,and slightly hard start in the morning.

So booked in with my local mechanic,
Also I had a full service done all filters changed + oil changed.

For glow plugs he only managed to change 5 of them, last one was very hard to remove, he didn't wanted to snap it, he tried many time but no luck.

So now after 5 new glow plugs misfire issue is gone.
Not sure about mpg improvement.
Also glow plug light still come up for 30 seconds as before.

My question is should I find another mechanic ASAP for last glow plug?

Any advice would me much appreciated.

Thanks all.
 
No.... not if its working assuming that was the good one!... its an easy test. Very strange that so many went at same time. I've never had more than one go at a time. They don't wear out, they are like light bulbs....working or not!
 
Had a very similar issue with one of our Fiat Ducato's, all four glow plugs showing as faulty on diag tool at 130K pain of a job to get at. Turned out be the control unit ????
 
If it starts and drives OK I would also be inclined to leave it. In the worst case a snapped plug can be drilled out (I've had this done), but not worth the hassle if it's running fine.

I've had two (out of six) plugs failed on my OM642 and this didn't really affect anything. With no plugs working at all (failed relay) it just took longer to start when cold. I drove it for nearly a year like that - no misfire of any kind. Apart from periodic plug failures and the relay I've also had the 225A 'mega fuse' for the glowplug circuit fail.
 
No.... not if its working assuming that was the good one!... its an easy test. Very strange that so many went at same time. I've never had more than one go at a time. They don't wear out, they are like light bulbs....working or not!
Only num(4) was working before,
But he managed to change num 4 but not num 6.
 
If it starts and drives OK I would also be inclined to leave it. In the worst case a snapped plug can be drilled out (I've had this done), but not worth the hassle if it's running fine.

I've had two (out of six) plugs failed on my OM642 and this didn't really affect anything. With no plugs working at all (failed relay) it just took longer to start when cold. I drove it for nearly a year like that - no misfire of any kind. Apart from periodic plug failures and the relay I've also had the 225A 'mega fuse' for the glowplug circuit fail.
Yes, It can easily start yesterday temperature was -8°c.
Also drives OK.
So as you said is better to leave as it is.
 
.... as its getting the engine proper hot before even trying to remove them.
 

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