The clock works fine but when I pull out the knob and try to turn it in either direction, it won't. Any ideas?

Does it require a push in on the knob, as with other Benz clocks?

I can only pull the knob out a quarter inch. Can't push it in at all.

Disconnect battery till time displayed on clock then hook it back up.

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Jim

I see what you did there....

I think there are some spring contacts on the pcb for the set and reset of the clock. Not sure because I don’t own an R129. The contacts may need cleaning.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles