front seats suddenly stopped working-525i

Thanks in advance for your help on this issue:

Yesterday, when I tried to turn on the heated seats, the light didn't go on on either side (driver or passenger) and the seats didn't heat up.

The driver side seat adjustment controls stopped working at the same time.

Once I stopped driving, I also tried pressing the DTC button that's between the seat heater switches in the center an it didn't light up.

Is this a fuse issue? If yes, which fuse needs replacing?

If not, any clues on what might be wrong?

Everything worked earlier in the day perfectly.

Thanks again for your help!

Karen