Radio Upgrade

[Ds300C]

My wifes 04 c240 has the tape deck with cd changer in the glove box. How hard would it be, if at all possible, to switch out to the 05 cd HU?

[UK-C200]

Should be pretty straightforward to swap out the tape deck version of the Becker with a CD version. You do need to be a bit careful, as you actually want a '04 D2B version (the flavor of the fiber optics interconnect) rather than an '05 MOST version.