Buying used car in Germany

Hello all,

I am planning to buy a used car here in Germany. With the number of options available here I am confused on what to buy.

* I am more leaning towards buying a German brand – A4, BMW, or VW (Can’t really afford a Porche:Shockked:) I hope this would guarantee me some resale value in Germany.
* A 2.0L engine would be fine (maybe even a 1.6L).
* A 4/5 door Limo
* 2007 to 2009 model
* Run less than 50K kms
* Performance on Autobahn and ride quality is important
* Fuel efficiency in the range of 7lts-8lts/100kms (combined)
* Planning to shell out a max of 15K Euros

Can anyone having experience in buying a used car in Germany please guide me here?

I have checked out some options at AutoScout24 Europas Automarkt für Gebrauchtwagen und Neuwagen and mobile.de – Deutschlands größter Fahrzeugmarkt. Suchen, kaufen oder verkaufen Sie Neu- und Gebrauchtwagen.

Thanks,

Nirmal