I was talking to my friend Andrei, he was off and had a bit more time to talk to me and kind of likes working on those cars as " they make him think" he was saying they have hydrolic lifters and and to check the oil as one or some of the valves may not be opening all the way. Causing missing heart beat sound. If this is the case and the car has been driven 20,000 km or so like this it more than likely caused valve damage and will need the head rebuilt. Another thing to check is the spring mount on the front end; scrape off the under coat and check that weld top and bottom. there may also be a factory recall on that mount and the dealership will repaire that for you. it also sounds like you can get the vin number and take it to the dealership to see if there are any other recalls it needs. Andrei was also saying that that car is mechanicle fuel injection and the parts relating to that system are expensive (for example the fuel regulator is $640 rather than $80) they are tricky to fine tune and they are important to be tuned properly ( if it is too lean it could burn out the injector)
also check for head gasket leaks as this engin is prone to leaks; oil or water around the head.
Also check for water leaks around the cowling and trunk. I guess water can make it's way in and make things mildewy.
If all these thing check out sounds like you will have a great running car.