I have been researching the C300 loaner deals in NorCal and it looks like that the prices have dropped from last year and the dealers are more willing to move their inventory. So if you gave up on your search from December (as I had done), it is time to look again.
I scored a “unicorn” similar to my previous deal (2017 Mercedes C300 NorCal - finally the deal I wanted) but this cannot be replicated. I just wanted to alert folks that the deals are there now if you look hard enough.