Retrofit radio keyless entry to infrared equipped w203?

[Rogrr]

Is it possible to change from infrared to radio? Maybe a module from later c class models?

 

[Rogrr]

It turns out I have radio remote. It's just broken somewhere. I'll start with the fuses.

 

[Rogrr]

Fuse 8 was broken and replacement popped the fuse immediately. It turned out to be a bad alarm siren. I removed the siren and put a new fuse in and the radio remote works.