CD Changer Repair or Troubleshooting

[Ron Johnstone]

The CD changer on my 94 E320 Wagon goes through a load sequence for all 6 cd's, then sends a "NO CD" message.
I have all 6 cd's properly loaded and I hear the unit cycling them in and out. I unplugged the changer to reboot it, with no success. The Model # is MC-3194, built in 1991. p/n A 002 820 42 89
Questions:
1. Any way to tell what is wrong with it, perhaps the laser is out??
2. If the laser is bad, is it a plug in type repair or is alignment necessary?
3. Lots of replacement units on ebay. What model #'s will directly replace mine?
4. Anyone want to sell me a replacement unit?
Many thanks!