Yep, ATF is what's required. In the hey day of Mercedes sticks, my shop made many cars shift smoother by draining the 90w that was installed by the local Goofy Lube and putting in ATF. By the way I believe you have a W110 chassis. I think the W111s were all coupes. Also your car is not a 220S: it is a 220Sb. The 220S ended in 1959. Hey, don't worry. You are new here, and I'd like to welcome you to the group. Your knowledge will grow. Hopefully you will get answers to questions and will also be able to contribute. One of the best MBs I ever owned out of the hundreds was a 64 220Sb. You have a very well designed and well built car. Enjoy it. If you have any questions, just ask the group. Everyone here is always willing to help.

Peter

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