hi there can someone help me with this prob please , i have a ml 270 cdi auto 04 model and my left side hid refuses to light up it was flashing on and off took bulb out fiddled about with it and its been working fine . but then stopped working completely . ive bought replacement bulbs but left side refuses to work although it did flash off and on briefly before stopping completely , i have swapped over igniter boxes and both work in right side bulbs as well ,,, is it an earth wire or fuse or whatever ???? please can someone shed some light on this lol