Re: Accumulator trouble, Selespeed
The accumulator is something that can be replaced, really simple job to do, just unscrew the old one and screw the new one on. The part number is 71734207. It costs about £50.
I ordered one the other day but got told there is a back order, Italy don't have any and they don't know how long, said it could be up to a couple of months. Let me know if you get told anything different.
An accumulator is what holds the pressure from the pump in the system. If your car pumps quite often or, like you say, it drops into neutral, it could be because of a faulty accumulator.
All of your problems seem wiring related, did the garage clear them and did they stay cleared?