You are in a good location to find these cars without too much rust. I would guess the main issue that you'll be dealing with is old air conditioning systems not working - but that will make the cars less expensive to buy initially.

Having had both styles, I would not turn down a good example of either. The maintenance procedures and requirements are almost the same - and exactly the same for the engines.

The 300SD makes a better long distance highway car, because the ride is a little better and the roar of the diesel is better surpressed by the body of the car.

I can see where the 300D might make a better city car because it can turn tighter and needs less space to maneuver.

In my early days, I paid little attention to the 300SDs that I came across because they seemed too big. But after you have one for awhile you realize it is not difficult to drive, and not all that big. I do believe it is a little safer due to slightly more mass and a longer front crumple zone.

So my advice is for you to watch out for the 300SD cars in addition to the 300D cars. You won't be sorry if you pick up a good example at a good price.

Ken300D

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1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles