Car hasn't been driven in over 5 years

I have been given a 1977 Mercedes 450SLC however the car hasn't been driven (or even started) in over 5 years.

My question is what should I do to the car before I try to start it up and see if it runs ok? The previous owner took very good care of the car maintenance wise, and said the car was running great before she stopped driving it.

I'm sure it will need a battery but beyond that I'm not sure what to start with. Any help/suggestions you may have would be greatly appreciated.

Thank you,

Kris