My May 08 build E92 is due for routine service which the dealer tells me includes a software update. Can I leave the new controller in or do I need to put the original controller back in for the software update?
f82 on order
'08 e92 M3 M-DCT (Jerez Black) -Current
'09 e90 335 xDrive M Sport (Sapphire Black) - Wife's
'02 e46 M3 SMG coupe (Carbon Black) - Winter beater