I like the Chevron Techron products. I used the Fuel Injector cleaner (a bottle in less than a full tank) before the next oil change.

The fuel system cleaner also seems to work well. I would think these would be actually the same products, but they do work differently.

If you have never cleaned the injectors and/or the fuel system, you might want to try it.

I don't know that a $20 cleaner is any better than the Techron brand and I believe it is approved by Mercedes, or at least was.

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)