Prices definitely down in my area. Got my 04 E320 wagon in 2017 for $5200, estate sale, stack of dealer records from new, but had been sitting couple years. Quite a few false codes first few months, but only initial repairs were replacing air pump and some breather hoses. Over time, have done ball joints, brakes and shocks. Records show lower ball joints failed every 50-60 thousand miles so will be ongoing repair. Mine is 2 wheel drive, didn't have airmatic, just rear air springs. When they failed, I did coil spring conversion. Wagon did 31mpg from Stayton(near Salem OR) to Spokane, WA this Summer. So near diesel economy. Early on, dealer replaced fuel tank assy under warranty and did SBS repair. 1 bad electronic glitch in Sept. Driving at night 60 mph, on cruise, dialog box pops up "SRS malfunction", everything shut off(including lights), lights came back on while coasting to shoulder. Switch off, pray, back on and normal start, uneventful drive home. Mercedes service writer tells me "they all can do that once in a while, you should just sell your old cars and buy a new one". Not very likely, but not complaining, as this glitch led me to purchase a really nice 300SD for fail safe backup.

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John 5:25