Have a prob with my "new" 500 sel.
Its a 1984 and had been sitting awhile,
it runs good but has a poor idle doesn't smooth out till about 800 rpm, and
it also has been blowing black smoke, altho I didn't burn a drop of oil from
ny to tx.
I think the gas may be too rich, and I need a vacuum diagram for the
breather and valve vacuum lines.
I am missing a line on the cold start valve, and I think oil is coming out
of somewhere and going down the injector throttle via the breather .
any and all help appreciated , oil pressure is 4 bars, down to about 2 when
it is at 500 rpm's.