How did you clean your injectors? Some sort of stuff added to the gas? If that temporarily helped it I would bet you need injectors. I think they're around $130 a set? I heard someone say here that MB gas injectors have a service life of around 100k miles. Don't know if it's true or not, but I wouldn't think it impossible either.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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