11-11-2004, 10:52 PM
With just 2,800 miles, my car downshifts on it's own to over 5,000 RPMs, and the check engine light comes on. Has done this several times. No response from BMW N.A.; dealer says supposed to do it; they say it's part of Hill Stability Control that has on/off switch in X5 and X3; but is built-in to software on 540i. Any one else experiencing same thing?