Ed et al
FYI, the Europa I and II as are most other radios of the era and even many modern ones are "DIN" sized. What that means is that most will fit; they were made to a common standard. There have been several different threads on radio issues in the past year. Ed, good luck on bidding on that eBay model! Before bidding too much however, contact Ed Ebel at Becker to see if they have a factory rebuilt on the shelf and what it would cost. You can call Ed at Becker: 888-423-3537
Becker North America has a service facility in New Jersey and they will service anything Becker ever made. They are also a good source of information regarding their products old and new; for example when I replaced my failed Blaupunkt with a Europa MU mono, Ed Ebel was able to find one with a serial number that closely matched the production date of my car. Now that's service. They rebuild and sell some of the older radios as well. So when that tube radio in your 300SL stops working, they will be able to fix it.
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored