Because...,, if it isn't in the manual it can't be true. Manufacturers are always so forthcoming about everything! The manual is a tell all.
Was BMW forthcoming about throttle lag? Were they forthcoming about the 28i moving to the N20? The 28i N52 crowd got screwed with that "placeholder" engine IMHO.
I'm sure if start/ stop reduces component life by a certain percentage and BMW is aware if it they will surely and gladly report it in the manual. I'm sure they'll say " we have this really great new technology in your car... but please don't use it for 2000km because we happen to know it will wreck your motor."
As far as this technology being around for five years, it seems rather unrefined and lacks smoothness for a longstanding technology. Let me see it prove itself in the harsh Canadian climate. It stays off. Period.
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