Hi, My 2009 ML320 CDI has no fuel guage working. I got a fuel guage error in Star Diagnostics. I took the SAM out and opened it. Not easy to get the back off but managed it. Did not attempt to remove the PCB board will all the mounting clips holding the connector stands. Anyway it look perfect with no signs of water damage at all. The part number is A1649004400. I have star diagnostics which i picked up on ebay. I weould like to try and re-code it again in case that helps. I would be delighted if someone could give me the steps using DAS to carry out this, thanks