The AUX input for a Mercedes C300 is going to be located inside of the glove compartment. You're going to want to fold down the lid of it and then look at the upper left side. You should see a small port and it may have a rubber cover still on it. Go ahead and remove this cover if You see one. Once You locate the port You're going to need to use a 3.5mm cord in order to connect Your device. Once connected go ahead and switch Your radio on to AUX mode by pressing the AUxButton and now You can stream music through Your stereo.
Malcolm A
July 30, 2020
The mercedes c300 aux input location is on the dash board of the vehicle, look for the 3.5 mm audio jack.
SucioDAN
February 3, 2023
My car no has the aux conection how can I connect other new?
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