All fuses are OK. On the 1996 E320 I have found the following locations containing fuses:
1.- underneath rear seat behind battery.
2.- Lefthand side of dash board (driver's door must be open for access)
3.- left side engine compartment close to hood hinges
4.- right hand side of engine compartment inside Module compartment part of the relay module.

All the light on the instrument cluster are working properly .

any other suggestions?

Thanks