The items that fit your Mercedes CLK (W208) are shown below.

The first generation CLK (W208) came with 3 different types of original head unit. Audio 10 in both Cassette and CD player form, Audio 30 and a Command navigation system.

The Audio 10 and Audio 30 sets are single DIN and have a pocket or CD storage trays underneath. The Command system is double DIN in size. No fascia is needed for either radio type.