Ebay?
thats where I found both of my parents
both were certified pre owned, and the parentals also purchased the extended warr ontop of the balance.
no "Major" issues yet.
'05 E320CDI
leaky injector at approx 20K
power trunk closer problem
CD Changer door failed once
headlight socket problem
'06 E320CDI
Transmission felt weird while accelerating ~ Software update fixed
again, power trunk closer problem
rear sunshade on pano sunroof malfunctioned
having the full set of window shades is nice, as well as heated steering wheel
wish they didn't have the power trunk closers, and only if the '05 had Xenons
the parktronic on a car that size is annoying.
Mom didn't like the ML CDI at all, hence traded for a GL that we LOVE