Poorly formed seams somewhere in the rear have caused a slow water leak. A dealer has examined it but can't hunt it down. A replacement pump would cost me $120 used, but I'd have to wire in a new harness connector and hope that there would be enough clearance to lift the pump out of the water.

So, I'd like to go aftermarket and skip the vacuum system entirely. Its an MB relic that I'm not really fond of. Just wanted to make sure no weirdness in the locking mechanisms would prevent me from going electric with an aftermarket system and new actuators.