Bit of a long shot, but a friend has a 2005 E60 525i with an SMG gearbox. It's been throwing up a fault on the dash saying only R, N, 1, 2, 3 available drive with caution. If he leaves the car off for a while it clears itself and it could be weeks without it popping up again. He used a basic scanner but it's not giving any code just show "unspecified error".

I don't have any experience with these gearboxes other than the SMG 2 in my E46 and to be honest I didn't even know you could get one in the E60 outside of the M5. Im thinking its possibly the gear position sensor, but I said I'd have a ask here first to see if anyone has any experience with this gearbox? Cheers.

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