Nothing works anymore

[Alin]

Hello

Due to unknown electrical issues, my MB does not operate : windshield wipers, horn, indicators, high beam, cruise control, horn and the buttons on the steering wheel so basically all the commands around the steering wheel are dead.
All happened at the same time.
All fuses have been checked and all relays as well and all is OK.

I only have short beam , parking lights and hazard lights.

Any thoughts on what might have gone wrong?

Is there any common wire that might not close the circuit foŕ all the faults?

 

[Blobcat]

Hello and welcome

Does it start? What’s the battery voltage like? Is the front SAM wet?

 

[Alin]

Yes, it does start well, battery OK, SAM ok!

I suppose its a common wire that feeds the controls in the steering wheel area but not sure about it.