There is no fuse, the relay is hard-wired to the battery.

On the passenger top inner fender, there is a large terminal where the main battery cable comes in. On one of the posts there is a sizeable red wire that goes to the relay. If you disconnect that wire, you will kill the power to the pump.

You don't want to just kill the spark and crank, because then you will get fuel in the cylinders with no spark. Just starting the car is preferable to that.

__________________
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