I'm copy and pasting this post from the SL forum.
I believe i am not getting into 4th gear. Its a 722.3. The vehicle owners manual says its a 1st gear start. I definitely only feel two shifts when starting out from standstill. When i am in low it does not shift at all. If I start out in S i feel 1 shift only. Then when I shift up to D it shifts only once more.
I am getting to close to 70MPH at about 3800 RPM. I think I should be at like 84MPH with a 351 rear diff. I checked an online web calculator for gear ratio/ speed conversions. I'm pretty sure i got it right. The tag on the Diff. says 351.
I guess i should check the vacuum module on the transmission. The bowden seems OK, but i dont know I'm playing with that now.

Update: / Questions I'm changing the filter now. Is there anything I can check while I have the pan off.
How many quarts are just in the pan, and is there a torque converter drain.
Are there any other suggestions.

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Chris
84 280sl
82 300d euro