My BMW Remote iPhone App No Longer Controls Headlight or Horn. After programming the vehicle with ISTA/P 2.49.x or higher, the headlight and the horn can no longer be controlled using the My BMW Remote App from an iPhone. I-Level F001-13-03-501 or F010-13-03-501 and higher Note: The lock and unlock function via the App works as designed. CAUSE A software error in the central gateway (ZGW) control unit
