Pete - yes, I have the Autronic SMC & it does cut the power to the pump relay when the engine stops. I was going to leave it at that until this thread started & I got to thinking about the possibility of a prang where the car pops out of gear & sits there with the engine running & the odd ruptured fuel line ! I saw it happen once on the road years ago - fortunately, the driver scrambled out & after a few moments for recovery, said "Sh*t, the engine is revving its bloody head off, I better go & stop it". Just as he took the first step towards the car, "WHOOSH" up it went !
This thread jogged my memory of that, so I think I'll put the inertia switch in !
Kind Regards,
Peter D.