let me add my experience of owning a D3 over a period of 10months to date, diesel though

[4.2 TDI]...
- corroded coolant pipe leaking coolant - parts incl. new water pump 450, labour 550 [engine off].
- set of front tyres [Pirelli's], 350
- tracking - 40
- front suspension overhaul, 550 parts and labour
- set of 2 x MAFs - 150
- set of 2 x EGRs - 250
- new Osram Xenarc's - 100
- oil and filter service [all filters] - 250
and a brief but possibly costly 'to do' list [for next couple of months],
- set of 4 or possibly 8 x injectors
- remedy KESSY [MOSFET replacement]
hope that helps.