[Ruviol]

I had a similar issue with this relay buzzing. It got worse during hot days. Turned out being the CAS module.
It will eventually get worse, symptoms such as buzzing, random clicking noises coming from the fuse box. Headlights and taillights staying on,etc.
Does the buzzing start when you unlock the car?
Does it do any clicking noises if you go in accessory mode? (Pushing engine start button, but without pressing the brake pedal)