the heater/ac blower doesn't work anymore I am a sr citizen & need s free help on 1991 Mercedes-Benz 420SEL

I probably need to replace the defroster and htr/ac blower as it desn't work on any switch setting...the fuse is OK ...where is it located so I can replace it...Thanks PS..( I'm celebrating my 88th birthday today ) ....

Asked by for the 1991 Mercedes-Benz 420SEL
have you checked the fuses for the blower motor?