Nobody addressed Mark's question... To the best of my knowledge fuel control and timing on the OM606 is NOT controled by ANY electronic devices. What exactly are they "chipping" and how do they increase power without adding fuel?

IMHO these "performance chips" are pretty much BS. I've bought two chips for a BMW I owned and could not detect the slightest difference in performance. Save your money and if you are really interested in a higher performing car buy an E320 gasser.

Tim