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Discussion in 'Engine' started by Iain430, Oct 23, 2011.
Thinking about changing the spark plugs on my 1999 E430 Avantgaurd.
NGK,Bosch or some thing else?
I've used genuine Merc on my C43 (similar engine) only because I couldn't be sure that I'd get the right plug from the aftermarket. There wasn't a brand name on the plug (that I could find) but I'm sure someone will chip in with the equivalent or you could always ask Patrick on the parts & maintenance forum...
Not the best answer but hope that helps,
NGK, Bosch, Beru are compatible and work fine with the M113 engine. Last time I got plugs from the dealer, they where NGK's with the MB star on the insulation.
I tend to use Bosch plugs.
Because spark plug manufacturers are constantly improving the operating heat range of their plugs a single model of plug is now more likely to cover a wider range of applications. Some regard this " one size fits all" as a retrograde step but as usual there will be winners and losers. Many owners of older models may find that they can no longer obtain the exact plug the car was fitted with from the factory- they simply don't make it any more- but usually the manufacturer will suggest an alternative- because of this wider heat range the newer plug may have better cold running /idle characteristics than the old or it might just be " marginal" for lots of high speed or track work??- just depends where in the new plug heat range band the old plug fell? - but for everyday motoring it will be fine. So the answer is - there often is no ideal plug- they will all work- just some better than others. Black C55 likes Bosch- because he knows from extensive experience that certain plugs work well in certain models- however you can't extrapolate from that to say all Bosch plugs will work well in all models of Mercedes. Personally I prefer NGK in my car simply because they make their own plugs.
I went to buy a set of plugs for my C43 from my local dealers and they were quite clearly marked Champion, because of this i decided to go with Bosch from ECP, though they were my second choice as i had originally wanted NGK, but they could,nt supply quick enough.
cheers all thank you for your help
The MB-Branded Bosch plugs are Platinum, while the MB-Branded NGK plugs are Iridium.
Iridium plugs are generally more expensive, and have a longer service life (according to NGK) of up to 100,000Km (around 62,000 Miles).
However, given that MB stipulate plugs change every four years anyway, in reality it does not matter much if you go for the Bosch or NGK plugs.
I bought a set of MB-Branded NGK plugs from BRABUSK8, and they were very cheap, so thanks Acid!