As I said before, I don't notice the problem in SD. I tried in D, but really didn't notice it either.
A theory ... the E39 M5 was noted for throttle response problems (mostly too sensitive). When I first got mine (many years ago), I was fairly ginger on the throttle and was not happy because of the too sensitive throttle. Later, I became less sensitive by running the revs highesr and the car became much more responsive. A lot of the issue could be the OBD adjusting to driving styles ... just a thought.
FYI ... did I mention that I have not experienced this problem on the X1. And ... I'm getting 25 MPG in town using SD exclusively.
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