Lever stuck

[mulrik]

My upper right lever (the one that controls where air goes) on the ventilation system is stuck. I can move it if i reach in and help move the round device the lever operates. Now I'm pretty sure I need to access this round device by opening my way into it. How do I do that easiest? There are 4 screws I can see in the front, but unscreewing those is apparently not enough. Any suggestions?
Thanks!!!
Ahh should say this is a car withour AC.

'67 250 SL Papyrus White 113043-10-000023

[Jonny B]

Use the search feature, type in "heater" there is a string dated 19 Dec 2003 with several jpeg files attached that are reprints from the service manual. There are probably also a lot of other helpful posts from that same search.

Good luck

Jonny B
1967 250SL Auto