I am thinking of buying a 300sd or a 300sdl for my teenage son to drive on the assumption that they are pretty safe and slow. I once had a 300d and loved the car. The local MB dealer has a 1987 300sdl for sale and it looks OK although the price ($4,995) seems steep. The inside is really bts, but they say it is ok mechanically. Am I nuts to consider this? My other option is an older saab 9000. I have had a few of them and they seem pretty safe and are a lot less expensive.