I think it is a new feature, automatic lane change
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11 550i - Euro Del - 30.7.10, 20 days, 2998 miles,19.2 mpg, top speed 142 mph
08 550i - Euro Del - Retired
04 545i - Euro Del - Retired
79 528i - Retired-BMWCCA member since 1979
77 320i - Retired