Yes, you sure can! I just did a search to give you a link to the thread that discusses this, but cannot find it?
Oh well... I have the codes for a 1995 C-class. They should be similar to your car. But for now, I'll give you the basics...
With car and climate control ON, press and hold REST for about 5 seconds (or until a new screen appears). There should be a 1 on the left side and a value on the right side (this value will be in-cabin temp.). I know how this system works on a dual climate control system, but not on your single mode... so I cannot be sure how it is laid out on your PBU screen.
To scroll up and down, you press AUTO (and whatever's on the other side where AUTO would be on dual climate). Sorry these are rather poor instructions, but you should be able to figures it out.
I can report to you what each value means later on this evening when I report my Pressures in Bar! Isn't this the best feature!?