ML320guy,
I've just read your post in this forum.
It seems you have the answers I need.
I tried pulling the middle A/C unit out of my '99 ML320.
I have the right side out about an inch. Can't budge the left side and it won't go back in, either! It's cattywhompus and is hitting on something.

Do I have to take out the radio? What does the removal key look like - and what do I query on ebay to see what one looks like? I, too, can make one to use if I know what it looks like?

Would appreciate your help.
Thanks,
brubet665
Bruce Everard
Palm Beach Gardens, Florida