[Physics_Dude]

I was bothered by the suddenly sticky coating on my 451's volume knob and didn't want to tare down the whole dash and radio just to replace/repaint it. So I designed a simple cap to go over it that anyone with a 3D printer can print.

Freely available here: printables.com/model/379085-smart-fortwo-radio-knob-fix

Problem with original fix here: smartcarofamerica.com/threads/radio-knob-gooey.119369/

 

[smark]

Nice job! Looks good. Did you glue it on over the existing volume knob.
or is it friction that? How did you introduce the white ring tip, on the knob?

 

[phillysmart]

Very nice!

Certainly more elegant than my solution: nail polish remover + q-tips

 

[Big Guy Small Car]

Nice job! Looks good. Did you glue it on over the existing volume knob.
or is it friction that? How did you introduce the white ring tip, on the knob?

Looks like it was a dual-extrusion setup.

Nice fix! I just opted to replace the entire deck. Wireless Car Play was an added benefit for drivability 😁

 

[Physics_Dude]

Nice job! Looks good. Did you glue it on over the existing volume knob.
or is it friction that? How did you introduce the white ring tip, on the knob?

Thanks! It is a friction fit with the old gooey-ness adding extra support. It takes some effort to pull it back off. There's also room in the tip to add glue or double sided tape.

The white ring is just a brief color-swap mid-print. No dual extrusion needed; black to white and back to black.

More info is in the Printables link.