97 C230 vacuum issue

[Martyszy1]

My car is shifting the climate control vent from middle to defrost when the car shifts from 2 to 3. Indicative of a vacuum leak in the shift retard system. I need some pictures of where the solenoids are located on the car, ty. I have lots of diagrams but they dont show actual locations

[andy_1100]

check here.
I did a vaccum element replacement for the fresh air/recirculation. Here's a whole tear down and assembly
https://www.youtube.com/watch?v=U3sacfr1W9M

Good luck