I'm getting a noise when I fisrt start up the engine. It sounds like rocker arms out of adjustment, could this just be carbon build up. I never accelerate heavy or even come close to flooring it. not with gas at $2.50 per gal. if it is possilby carbon build up, what do you suggest, or is rocker noise a common problem and needs to be looked at. 70.000 miles, no extended warranty, would it still be covered.

is it like a ticking/knocking sound? If so, it's lazy lifters. I had this problem with my ML too several years ago. I took the advice of a fellow forum member and did an oil change with Mobil 1, drove it aggressively for about a hundred miles, and then did another oil change with Mobil 1.

I do an oil change every 7500 miles whether FSS says to or not, and the noise has never reappeared - knock on wood....

And I do floor it every once in a while - these are engines designed for the autobahn after all....