I recently brought my 230 SL out of a 20+ year storage. I boiled the fuel tank, rebuilt the fuel pump and replaced the fuel filter. I still have fuel related challenges and just cleaned out my CSV nozzles, which weren't spraying, but rather were dribbling. I used Marvel Mystery Oil with the first few tanks of gas.
My car continues to be hard to start and I'm installing a momentary switch to override the one second relay.
Good luck with the road ahead!