This is a great variant with form and function designed specifically for the car. Overall it works well and I enjoy the bluetooth features, speakerphone etc. Here are some additional details: My W203 C180K had a fiber optic loop but only for an old phone and CD stacker - if you have a Bose amp in fiber optic . optical loop, this stereo does not work. Installation was quite difficult and I had to remove a lot of trim to install the microphone, GPS and Wi-Fi antennas and a rear camera (I bought them separately). The reversing camera works great and the car wiring already had a reversing trigger so I could just plug it straight in. Some disappointment that it came with the wrong antenna adapter which I found locally. Another problem is the canbus adapter for the steering wheel control. The instructions are terrible but I finally found out that you set the CLK option to work in W203. This feature is clunky, however, as the volume buttons work, but scrolling through the car menu options clicks 'next' on the music/radio every time. Can't stop it unless you disable canbus. The radio itself is good, sounds very good through the radio and I only hear lower quality audio over bluetooth but not too bad when driving. My recommendation is that this is the best option for the W203 to keep the controls on the steering wheel etc and have something similar to the original Mercedes stereo.
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