how to own a rarely used MB

Hi all,

My 91 190e 2.6 has 131K and I've had it for about 2.5 months. For the last ten years I've always had long commutes to work (20-40 miles one-way). Starting July 1st, I will (literally) walk across the street to work. I know nothing about owning a car that will basically become a weekend driver. Should I take the car out on the highway a few times a week? Should I let it sit the whole week and just use it on the weekends? I'd like to keep the car for a while, so I would appreciate advice on what is best for the car.

Thanks,

Rick