The steering wheel, dash, console, everything has to come out.
The evaporator is buried in there.
It is a 15.5 hour shop at a shop, and is not an easy job for a DIY. Some mechanics even have trouble doing it, and have been known to tow cars to a Mercedes specialist or a dealer to finish the car.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".