i have a 72 450se 4.5, replaced trigger points , injectors, all tune up parts, and installed crane igniton to replace points, car starts but has poor idle and what feels like miss, checked and cleaned all grounds and tried an other computor (used but good) all this and still no improvement i belive it to be a signal problem from or too computor what do i test for voltage?? ohms not sure help!!!!!!!

Do a search on this topic...you'll get lots of results and probably some good info.

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'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.

"A Mercedes-Benz is like a fine wine, it only gets better with age."