Is there a relay, potentiometer or something similar in the blower on w123 cars with the newer style acc (like my 82)?

I never noticed it before, but especially when the fan was set to auto, as the speed changed, I heard a clicking from down there. It really sounded to me like relays.

I dont recall hearing that previously on this car (not that I've been listening for it), or on my other 123s with acc.

Thanks!

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)

Maybe you hearing the relays in the ACC pushbutton controller?

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )

I'm definitely familiar with the clicking and hissing of the acc controller, but this is from down below the glovebox, where the blower lives.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)