Hello all, my car search finally came to an end after looking a a ton of cars.

I found a 1991 190E 2.6 in great condition. It has 104K on the odometer, interior and paint look great, and nearly everything works good.

However, I did have a few questions and am hoping you experts can steer me in the right direction.

1. The ac works and blows somewhat cold, however I would like it to be colder. It has already been converted to 134A, so can I just buy a can of the stuff and recharge it?

2. The air and heat blow almost completely out of the two middle vents. The far left and far right vents are VERY weak or don't blow at all. What could be the cause of this? If I shut the middle vents the side ones do blow, just not when they are all open.

3. I let the car sit and idle for like 5 min and noticed that the electric fan came on. Is this a normal occurrence? (It was about 90 degrees today and it was after an hour long drive)

4. I noticed that as it was idling, the outside temp. gauge kept climbing up, eventually reaching about 104 degrees. However, It was not nearly that hot outside. Once it was driving it was displaying a good reading, just not idling. What could be the cause of that?

5. The car seems to look and run great, but it didn't come with any maintenance records. Is there anything I should do right away, or the near future, to the car?

6. As a Mercedes and 190E newbie, what would you guys recommend for oil change intervals? How about the type and weight of oil?

Thanks for any advice you all can give. Here are a few pics: