Thank you all for the advices.

I didn't know at all that SAAB does not exist anymore as a car producer. It's really a pity !!!

Since I believe that it's extremely important to have a good customer care service, I am now looking for a car whose brand will be strongly represented here in Qatar.
I understand that Toyota is the number one here but it seems to be far too expensive.
Although AUDI is a very good car I didn't here good stories about local maintenance service so ... I was thinking about KIA which should have a very long lasting warranty.

So what about KIA? Any advice about a good medium priced car to buy in Doha?

Thank you all for sharing !