While you have the panel out, do the odometer repair. Pretty simple. As was said, do some searches - here and at dieselgiant.com and you will find more advice than you need.
I love my 240D ...super simple, solid and dependable (not that the wagon isn't

)
My CC is out, too. I removed the amplifier from under the driver's side kickpanel, but haven't gotten around to resoldering all the joints yet. That seems to be the most common reason for failure. Rebuilt units are very $$$$!
enjoy it Aaron!
P.S. nice wagon StaggerLee - I love the color and I'm jealous of your transmission