Spring has come, and old threads have new life once again
Recently been having the same symptoms described in this thread (lights flash on while driving for a second, high voltage codes, rough idle, etc). Replaced the battery (5 years old anyway...) but it's still acting up. Thought it was a loose cable at first, re-snugged... No change. Fairly certain it's the alternator/ voltage reg at this point.
Anybody have a good source for the regulator? No longer available in the link above anymore
Edit - Doing some digging... if alternator is TG15C098, the regulator for that is 593873? Found somebody selling on eBay for $40, lists as compatible with Z's (a a C-Class...). Gonna take the gamble to try and save a few hundred bucks.
Link
HERE