Modernizing the dated COMAND audio is a common project, but there is disagreement about difficulty because the car uses a fiber-optic MOST bus. Some owners report clean aftermarket (Kenwood, Dynavin) installs; others warn a fiber-optic decoder/adapter is required. …
Head-unit and audio upgrades over the fiber-optic MOST system
Mercedes-Benz C32/C55 AMG (W203) · cosmetic