Trip Odometer Reset Knob

[Atazman]

Does anyone know if the trip odometer reset knob (probably a black plastic) is available?

Is it the same as the black knob for instrument light dimming?

And last..... How is the knob installed?

Thanks.............

[WRe]

Hi,
the knob is fixed on the backside of the speedo glas with a snap ring.
...WRe

[Benz Dr.]

That's right, and you need to be very careful during assembly that you get everything positioned correctly or the glass will easily break.

[450sl]

And there is an early and a late version black plastic original and a chrome replica .

[Atazman]

Thanks to all for the info; I'm on my search for the black plastic replacement.  The picture is very helpful, and I will respect the glass with lots of caution.