We have a 2007 Tour but a 40TD and love it. Also have the 400 HP engine.
As ours has over 30K miles, the only major things that have gone wrong:
- serpentine belt snapped at 14K
- alternator froze and snapped a second belt (ALWAYS carry a spare)
- exhaust manifold gasket blew
All were replaced under warranty by Freightliner.
See if the seller has the maintenance records.
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
'17 Winnebago View 24V, '02 R-Vision B+
RVing for 19 years & 150,000+ miles