Recently purchased a 560sel with 34k miles, original southern CA car & spent last few years in southern NM. Car had been in storage & not running for a couple years.
So far, I’ve replaced oil & filter, plugs, wires, cap, rotor, battery, fuses, fuel pump relay, tank screen, fuel pumps (2), fuel filter, accumulator, hoses, air filter & breather element. Car starts & idles beautifully and will drive approximately one mile before stalling quietly without warning. After sitting 1-2 minutes, starts up without hesitation. Stalling continues with shorter intervals. While idling, I looked under car to inspect fuel pumps & noticed a very loud buzzing sound, perhaps fuel starvation or blockage. Needing some assistance with diagnosis or a baseline to get sorted. Thanks in advance.