Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Mentioned: 0 Post(s)
Quoted: 35 Post(s)
Hey, Cam, welcome aboard.
Please click the user cp link and complete your BW profile for vehicle and location as that is often useful information. Also, it's probably better to post questions about your car in your vehicle's native forum (W211) rather than in the introduction area.
I'll share what little I know, because I don't think we got your car in diesel in the US that year but if you have the L6 diesel you should be able to get the regulator out with the alternator in place. It is tight, though, for me the extra bit of effort to remove the alternator first would be worth it, that way you can more easily see exactly what you're doing and keep things a bit cleaner. For the V engines you have to remove the alternator anyway, which really isn't that difficult anyway, just have to buy the E-torx bits for the socket set. Either way, naturally disconnect the batteries before you begin, be sure the key is not in the ignition when you disconnect or reconnect batteries.
Your radio code should be in your owner's manual, else get it from the dealer, you'll need the VIN. However if you have COMAND I think it has an internal battery, so long as it's not physically disconnected you may be fine. There are some other things that will have to be synched, check the manual for those.
Take care and enjoy the ride,
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)