Here at Autoplenum nobody sells his car.
Autoplenum is for questions about cars. To help you with your search here i give you a link with Ford S-Max Cars which can by buy.
All these cars have a diesel engine, everyone is in private hands in Germany.
But:
7.500 Euro with 140 hp and Titanium in an S-Max is very difficult. In find 5 cars and only 1 Titanium.
If you wan't an S-Max for that money, you have to make compromises.
http://suchen.mobile.de/auto/ford-s-max-diesel-van-kleinbus.html?useCase=ChangeSortOrder&__lp=1&scopeId=C&makeModelVariant1.makeId=9000&makeModelVariant1.modelId=47&makeModelVariant1.searchInFreetext=false&makeModelVariant2.searchInFreetext=false&makeModelVariant3.searchInFreetext=false&makeModelVariantExclusion1.searchInFreetext=false&minPowerAsArray=86&minPowerAsArray=KW&maxPowerAsArray=110&maxPowerAsArray=KW&fuels=DIESEL&minPrice=6000&maxPrice=8001&ambitCountry=DE&negativeFeatures=EXPORT&adLimitation=ONLY_FSBO_ADS&categories=Van&sortPath=specifics.mileage&defaultOrder=ASCENDING&lang=de