My R320 just got an indicated 19.6 mpg for the day, on ice, with the Blizzaks The thing is actually fun to drive on glare ice
I like my 2007 because it's the last year of the no-adblue V6 commonrail turbodiesels for PA (at least sold here new). I'd rather not drag around the weight of the extra three gallons of solution... I live in the country so very few people ever smell my NOx emissions...mostly me.

As to problems, I did have to replace one of my Smartkeys under warranty when the black plastic button for the rear hatch release cracked a bit. I'm glad that sucker was under warranty, and now I am more careful not to apply too much pressure to my Smartkey ... also the rear hatch doesn't always open on the first try.

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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic