Okay, I read the other threads, and my decision will be...(drum roll please)...the RED stuff that MB recommends.
All of my MBs have been serviced by the dealer (until now when I replaced the OVP and radiator on the 300E), and they all have the red stuff.
Unfortunately, all I had in the garage was the green stuff (for the Conquest outside) so I used it to test drive the car and look for leaks and such. Going on vacation, so no time to do the flush myself, so I'll just drop it off at the dealer's and have them correct my error.
Thanks again everyone!
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car