In my 190e 2.6 which has the 103 engine, the A/C blower fuse is in a black small box that holds two fuses (it's one of them) right infront of the fuse box. It's next to the strut tower mount on the driver side. Mine stopped working and it was that blown fuse.

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Meza
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer