I am new here. This is my first post. Does anyone know how to remove the backcover of the driver seat? I am driving a E220 CDI 2009 model (W212 I believe). I pulled out the headrest and unplugged the wiring attached to the headrest. I now need to reconnect the wire to stop the dashboard flashing a warning signal (suggesting my front lights malfunctioning which is clearly mistaking). Thanks in advance.