The problem is that you need to test the relay and the inputs to it.

Verify that the relay's inputs - tach, start, and engine brake (in 85) are correct, and that fuel pump works, wires are good, etc. If problem still occurs, replace the relay.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe