A set of Bridgestone Blizzaks would help snow traction in a 123 as they did in my R320.
My R class is now pretty unstoppable in nasty winter storms as opposed to white-knuckle scary at 35-40 mph in snow last season. Of course I can go faster than a RWD 123 due to the 4Matic, the ABS, ESP and stuff. I have to keep an eye on the speedo so I don't go over the posted speed limits of 45-55 mph during blizzards

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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