I will be looking for a 78-85 300td wagon. any advice on what I should be looking for in trouble spots? any spots prone to rust and anything mechanical that is common. I am a mechanic and have been for 20 years so I can check the usual brakes suspension electrical etc. How are the transmissions. I have owned several BMW's and found that the manuals were fine but autos tend to be iffy after 100k. I have done some minor research on these cars and found them to be quite reliable. Any help is appreciated.