Glow plug fault.

[DougMb]

I have one glow plug gone on cylinder 6.
The car starts fine with just a extra couple of turns in the winter. The glow plug light is staying on for a minute or so after it has started. Now my question is should I just change the one faulty glow plug when the others are fine. Bearing in mind that the said glow plug has been faulty for around eight months now. I know on other posts it says change them all because the others will follow the faulty one but so far I have not had any problems. It just seems a waste of money when I have five glow plugs still working Your opinions would be greatly appreciated.

 

[John Laidlaw]

It’s your choice really- the hassle of getting the beggars out will either lead you to do them all when you’re on a roll or put you off doing the rest!
If it was me I’d be inclined to do them all and get it over with, but that’s probably just me!

 

[DougMb]

Thanks for the reply. I won't be doing it myself, I'm useless with my hands I use a friend of mine that used to work for BMW.
Another question which I should have included is what make of glow plugs to get. It seems to me that Beru seems to be the favourite for Mercs. I was wondering about the comparison between them and Bosch Duratherms. Plus I would appreciate it if anyone could point me in the right direction to good online deals

 

[onefortheroad]

Think 6 bosch are about 46 quid. Hardly a fortune tbh.

 

[DougMb]

I was also wondering about a trustworthy place to get them from as well, because apparently there's a lot of fakes going around on ebay

 

[onefortheroad]

https://www.ebay.co.uk/itm/6x-Bosch...362017?hash=item4894d0dfa1:g:DmYAAOSw8MJbq5lE or search om642 glow plugs for other options.

https://www.ebay.co.uk/itm/6x-BOSCH...m=382151789471&_trksid=p2047675.c100005.m1851