I am looking at a second MB, a 75 300d that does not start.It has been sitting since July when in was parked and was running good at that time.this would be a long distance purchase (approx 400 mi) and I would need to get it up and running for the return trip.What should I look for?

__________________
81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project