Hi 86....

I owned a 300SEL and it was a great car, unfortunately its life was cut short by a bad driver. The engine bay is huge and you can do all sorts of work without much worrying. The oil filter is a spin on located in the back and easy to get to..

My advice is to look at the front of engine for any oil. They are known to have some oil leaks up at the front, and its only a minor problem. However, you might be able to use it as a bargaining tool when it comes to buy. If the car is in great shape.. i guarantee you will like it.