I was afraid that water could have made it's way through wiring looms, from the door to the sam, or condensation from the A/C came out the wrong way because the bleeder hose is clogged.
But as I've said from the first post, it's much more likely that it's a weak battery. Get a mate with a good battery to lend you his, and see if the problems persist. You may still need to get to a STAR machine to clear any logged faults, but with a good battery there should be no pending ones, just old codes that are stored for later reference.
Forfours are much more leak proof than 42 and roadsters, but it can still happen thanks to our glued on roofs and age, pressure washing etc.
I've had water dripping from the front interior courtesy light. So they are not submarines, but although not sloppy made, the fitting of most parts is far from perfect.