hi
I have a 2003 ml 350 with 8800km on the clock.When should I start using a fuel injector cleaner?

 

I don't know that I'd use it all, but I would even think about it for a long, long time.

 

HI Megamer, I would every couple of 1000's mile. There is water in the fuel, it's a great way to help it pass without damaging the injector tips. Especially if you live in a wet area. The valves like it too. However use with at least 20 gal's of gas, the additive can be hard on the rings.

 

I have used RED LINE fuel conditioner with great results I think. That is one of the things you hardly know if it works or not. They have a diesel fuel "catalist" that I know works great, cuts down on the smoke and clatter is reduced too.

 

Also Chevron Techrolean (not sue about spelling) was rated by car & driver as one of the best gasoline injectors cleaners on the market. Prices though $$$$$$$ good luck

 

If you use the cleaner-in-a-can don't wait too long. It's just a light duty cleaner and can really plug an injector if it dislodges a gob of something.

A well-supplied mechanic can clean the injectors. They force cleaner through the injectors under pressure. But wait longer to get it done.

I would do the latter.