Welcome to AF
So when the lights go out and they come back on ,has the car quit and will not start or have you shut it off yourself and tried to restart it? Did you take it to a dealership or just a "garage" ? I would like to say the multi function switch is going bad but you have other issues as well. possibly a bad ground somewhere they are unaware of ????? Do they use a lot of road salt in witner where you live? I would also look closely at fuse box under hood and inside car for any signs of melting or corrosion.