The problem of communication via obd2 with mercedes 220cdi 170cv year 2008 delphi

So guys, I bring my experience, I have a friend with a mercedes calle c 220cdi 170cv of 2008, I tried to identify the ecu via the obd2 socket first with the galletto committee and then with the kess v2 but nothing to do, the only change to the electronics that make ? was the installation of xenon kits with related units, pu? to be the one to disturb the line? the far? to tour, but I would like to understand the problem and maybe try to solve it, I made a diagnosis with autocom and had 4 errors in ribbon, between which one that are not able to remove U102700 permanent, pu? be the problem? thanks to all