hm.. i assume the control or the radio are already "ring master"- why would they not be? is there scenario when they are not "ring master" or they tend to "forget" under certain circumstances? the initial problem was that the mcs unit was dead, but the dealer (non-mercedes) replaced it with an mcs from another 01 ml55 ... and cd changer now doesnt work ( dunno if it worked before). could the new mcs be the problem? are cd changers and mcs "paired" in some way?

one last thing- i thought all 01 ml55 have rain-sensor... mine seems to have the actual hardware on the windshield, but clicking the stalk one down produces speed-sensitive intermittent wiper action? does the rain-sensor need to be activated in some form?

thanks in advance..

alex