Instument lighting failed

Moin moin, now I’m on again with a question. Yesterday evening my better half called out from the car and said that the instrument lighting was completely out. Neither Tacho nor DZM or MID, everything dark. The lighting of the ECC works perfectly however. There were no other control lights like battery or MKL or the like. If you turn on the light, the MID becomes dark. Light again, MID again on. The controller at the light switch does not cause any changes. Now please tell me that there is only one fuse burned and where I find it. Unfortunately I did not find it in the fuse box, I am actually sure that I pulled and controlled all fuses, but you can never know it. Nice Tach for the first time Jackson5