Somewhere in the center differential of a 4matic is a seal. This seal maintains a barrier between the differential and transmission, and is ALWAYS under some 3,000 psi of pressure. Hence, this seal leaks consistently and requires a rebuilt diff go in. On a 4matic there's apparently no way to avoid this recurring problem.

Stick with the 2wd, and buy snow tires if you need them. I've never gotten stuck here in New England with this formula!

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo