Later BiTurbos The cars produced in 1986 and after had a number of advances. They had a fuel injetion system instead of the more trouble prone carburateurs, and water cooled turbos for longer turbo life. They also went to a 5 bolt pattern for the wheels which makes it MUCH easier for one to get after market wheels for the cars. The fuse for the a.c. was too small and the factory had the dealers solder a larger glass bulb type fuse holder in place to take care of the problem. The new, and readily available fuse blocks cure this, and they are not that expensive.
Installation is a snap.
If you have an early Biturbo, save yourself some grief and be sure that it has the newer fuse box. A lot of people think the Biturbo's normal 65 amp 14 volt alternators is not up to the job. You can rewire your current unit for higher ouput or buy a larger alternator. Some people have even fitted GM alternators to their Biturbo. Call the people at MIE - I'm sure they can help.