Hi all, my first post here but thought I would just chip in with my findings, and hope its not to much off topic.
I recently swapped my 2004 MY SAAB 9-5 Aero for a 2004 W211 E Class, and to be frank the difference (my perception) is like night and day in build quality. I cant comment on reliabilty yet between the two as I have not had the E Class long enough, but I can safely say the Saab was possibly the most unreilable vehicle I have ever owned. Problems ranged from worn seat runners so that the front seats slid back and forth under braking, switches falling off, gearbox syncro problems, clutch replaced, persistent AC / Blower panel fault neccesitating 3 weeks off the road to fix, Xenon adjusters breaking, Heated seat switches broken, Alarm faults, fluid level indicators inoperative, dash replaced twice to cure major rattles, split pipe to Turbo and several more issues. This was on a car with less than 22K miles on the clock, and I had just had enough by then. I heard that in 2003 GM changed suppliers for a lot of components, hence the problems, but I dont know how true this is. My local dealer service was exemplary throughout though, even giving me a 3 month old E class as a hire car for 3 weeks while mine was being fixed. In my view the 9-5, although undeniably quick in a straight line, just cannot compete with the drive of the W211, although of course one is FWD but theres a bit more too it than that, well for me anyway.
The daft thing is we owned a 98 MY 9-3 for 3 years that gave no problems whatsoever and had four times the miles on it. Also ran a couple of E39 5 series BMW's of 1997 and 2000 vintage that again never seemed to go wrong. I'd like to think I had a Friday car, but having heard other owners experiences of the newer Aero's I'm not so sure.
Bit of a shame really as I'd wanted a 9-5 Aero, I guess something of the percieved underdog appealed to me, but the experience has really turned me off the brand now. Having said that, I do love the Merc, so its not all bad