That was very true of the early (1998-1999) MLs, particularly the ML320. The
newer versions appear to have most of the "bugs" worked out. We have an ML500
and are very pleased, and had an ML430 before that with very few problems.
They are certainly founded. Here, a 2000 owner just won a small court claim
against M-B and its dealer for troubles. She had to return to the dealer 30
times in 18 months. Hopefully, it is the minority.
Everything you'll get here is anecdotal. Consumer Reports is the only hard
data we have and it is not good. The ML is below average, although not as
bad as the X5. The later models seems to be doing better, but they're still
a far cry from a Toyota or Honda.
But cars with good repair histories tend to continue to have good
experiences, partly because the car itself was better screwed together, but
partly because the owner is driving and maintaining it properly. If your
ML500 is doing well, then I'd keep driving it unless you have another reason
to get something else. You'll take a heck of a beating if you sell it after
a year. IOW, the time to be uneasy is before you buy, not after.
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