question on upgrading MKIII to IV
I searched but could not find the answer to this.
I just took the plunge and purchased a MKIV (6590 6 942 908-03)
from naviandbmwparts on ebay. This unit should be a plug and play replacement for the MKIII in my 02 X5, however do I need to disconnect the battery before exchanging the units.
Thanks.
|