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Some advice from someone driving on the Alpina flash for a few years, get one of the new "custom" alpina flashes instead. The authentic Alpina flash is damn good in M or S modes, but it is not great in D mode. When in D mode it shifts at the earliest possible moment. That means that, with normal throttle, you are shifting at 2k RPM or below. It might be a decent idea for mileage, but it is a lot less responsive than stock. Most people with the Alpina flash say similar things. Since software to read, modify and flash the TCU is available, people have loaded the stock flash, and the Alpina flash, and blended the two together to keep the M and S modes of the Alpina and have a more stock like D mode.
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