Nice ride! The wagons are very versatile and relatively cheap to keep running. Keep up with regular scheduled maintenance especially the transmission fluid. If you have to do the head gasket the engine should be go to go. With a little elbow grease and some parts you should get many miles of enjoyment.

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07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230
retired W210 (x3), W124, W126