I've just been given permission to take "an old diesel" mercedes off of someone's hands. The car is covered and the paint is good from what i understand, but it's been sitting for a while and will not run. What should i take with me to atempt to get it running/ diagnosed? I'm getting the car as a gift, and would like to be able to make it run. From what i understand, it's a late 1970's model. I do not know the model number yet, or the actual year. I know it's vague, but any suggestions would help.