http://www.benzworld.org/forums/w251...-pay-06-a.html http://www.benzworld.org/forums/w251...et-iphone.html http://www.benzworld.org/forums/w251...e-several.html http://www.benzworld.org/forums/w251...t-2nd-row.html
Dig a little more beyond first page and you'll find lots of useful info. Or just do a search.
Configure all your options on Edmunds.com and select average condition. You should be able to get it close to trade-in price. CPO cost another 2k or so. Does it not come with Navigation and pano roof? If you really need a bench seat then go for '08.
I bought mine last July @ $28K no CPO, and I knew I overpaid, could have got it at $26K. Here's my option list:
26k mi
pleather (fake one)
Harman Karden 5.1 w/ rear seat controls
Navigation
Pano roof
Heated front seat
Power lift gate
Power rear quarter windows
17" wheels