Just wait until the last week or so before you need it. They are constantly coming out with a newer faster model. I think the new Intel M processor (Centerio ?) has USB 2 support.

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1995 S-350
370K + SOLD
1952 220B Cabriolet
39K kilometers + SOLD
1998 E300D
310K +
2012 E350 BlueTec
120K