I'm looking to purchase a very low mileage, 20K miles or so, out-of-factory warranty, preowned '06 E320 CDI.

In searching AutoTrader.com, this is what it looks like to me:

All things being equal - the CPO MBs at authorized MB dealers seem attractively priced when considering they are covered an additional 12-months up to 100,000 miles, versus other than MB dealers.

Unless I find an unusually low-priced and low-mileage '06 from a non-MB dealer, it looks like my search will be confined only to the MB dealers preowned stock. With a CPO from MB that covers 12-months to get any bugs out - it seems the way to go.

Any comments germane to CPO MB dealer purchasing appreciated.