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Thank you for the review. I am a recent purchaser of a 523i - and have run into the same issue with the car going into limp mode when it gets to 100kmph with the engine under load (going up a long steady hill on a motorway) and the cruise control on. It was a mystery to the dealer, and apparently to BMW here. Have you had any luck yet with a diagnosis from BMW on your problem? RgdsReport it
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