Hi, there should be as mercedes fit there CB radio up above the windscreen there and the feed loom will be the same on all trucks, i used to drive one and we had the cb fitted in it, it fitted in a ready made hole, there is normally either a blanking plate or a pocket were it should fit, one thing i will say just make sure it is a 12 volt feed as most cb`s are 12 volt.
james, May 2009