Here is a link to an old eBay advert showing the lead you need if you have the non RCA version of the TV tuner.

Video Audio input Mercedes Comand 2.0 TV Tuner OEM su eBay.it Cavi, Spine e Accessori, Autoradio e Monitor, Auto ricambi e accessori

Richard

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Of course i'll take it apart.

www.mercupgrades.com
http://www.comandonline.co.uk