No, the ticking noise hasn't gone away.
It comes and goes. Sometimes it's really bad, and other times it's so faint, that the sound of the car running muffles the sound.
I believe the blower motor is wearing out, and the blower motor fan blades are wobbling, and rubbing on something, causing a ticking noise.
The ticking noise is there regardless of whether I'm using the a/c or defrost, heat or cold.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".