You can also get Zerex G-05 at Advance Auto, just did a flush on my 91' 300SE. Its like 19 bucks for a full strength bottle. I think at the dealer coolant is like 24$, you should be able to find a 10% discount coupon on your local dealer's website for parts/supplies too.
I used Shell ATF 134 for the trans, and my power steering fluid is the white bottle from febi.

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"It's what non-car people don't get. They see all cars as just ton-and-a-half, two tons of wires, glass, metal and rubber. That's all they see. People like you or I know, we have an unshakable belief that cars are living entities..... You can develop a relationship with a car, and that’s just what non-car people don't get."
-Jeremy Clarkson