I have found a replacement aftermarket blower switch for Kuhlmeister and other under-dash A/C units in 108 and 109 cars.
I bought one switch to see if it would fit OK in a 1972 280SE - it does.
However, the owner found that the original switch only needed cleaning to work properly. so I have the new switch available for sale.
I am asking $112 for the switch plus shipping.
The switch substitutes for MB part # 108 821 03 51 - which is apparently NLA even at the Classic center.
I can accept Pay Pal or MC/Visa