For what it' worth, I know of a few people with earlier mid-1990's W140 V12s. No problems except normal maintenance and door hinges being replaced.
I've read of the electronic gizmos being a problem, however the issues cropped up more on the earlier W140's.
The V12 is a totally different driving experience than a V8. Rock solid driving at 120+ mph. Very few sedans can touch it.
Have the PPI done buy someone who knows the 12 cylinder cars...
