Hi Zero Nero. I have had my 2000 540i serviced at Autobahn East multiple times. I started going there for normal maintenance items such as AC recharge, hose replacement, etc then moved on to the bigger items such as Major suspension overhaul work and to fix leaks.
Mark is very professional and thorough, and gives you options. Just make sure you make an appointment and be flexible to leave the car there if required to get the job done right.