sl power loss wiring?
I hate to be a wet blanket, but my 94 600Sl got very ill starting the exact way. Turned out to be failed wiring insullation on the harnesses to the electronic throttles. It started as power loss at high rpms cutting out like clogged fuel filter, then it went into limp in mode (check engine light, max rpm in gear 1400, etc.)
Detailed diagnostics said both electronic throttles bad $4300 + labor etx. I drove it howm , pulled them to see, and found the wires in th eharness cables were bare, sitting in a mush of duts that used to be the insullation.