Let us know what you have (make and model#), perhaps a picture of it would help. I replaced mine with one similar to this one in the link below, not a name brand but because it is Android based I can load all the same apps as an Android phone, in particular google maps and my radar and a host of other apps. Not to mention it does apple car play (and the equivalent android car play). Being how the E450 (and E350) based Class C's are setup, the 10.1 inch display screen doesn't block the A/C vents or anything else on the dash, and is very eye friendly while driving. I will also add that it sounds a lot better than what I replaced, likely due to the graphically controlled audio equalizer in it.
In any case, I will check as I think I saved the radio that was in it prior to me swapping it out and if so and if it is a match for yours I would consider just giving it to you for the cost of shipping, not sure why I hang on to things like that anyway, however mine being a 2010, it is probably not the same as you have. ~CA
https://www.amazon.com/YODY-Bluetoot...5341226&sr=8-3