Don't let people scare you away from good maintenance practices such as changing transmisison fluid. You can use regular Dex III fluid or synthetic. It's your choice. I use Dex III and change it every 20-30K. I don't do a lot of highway driving. Changing the fluid is cheap and easy on these cars.

In general, it's a good idea to change out all the fluids and filters on any used car purchase. This gives you a good starting point for future maintenance instead of trying to guess how good a fluid may be.

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95 E320 Cabriolet, 169K