Which engine for city traffic?

Hello, I am looking for a used 9-5 station wagon for our family, only the engine question torments me a little. Which would be recommended, at about 17,000 km a year and of which more than 80% (!) city traffic ? I am a little helpless, since most here are not exactly enthusiastic about the durability of their respective engines. So which engine, and especially how much may it have run ? Does one of the friendly users still have the Ultimate SAAB page in the net with also older Da ten …etc. around the 9-5 ? Many thanks in advance and with kind regards Christian.