i have a w580 and i tried everything to find out too..
it was confusing because one person will say one thing, then another person says the opposite..
i personally came to the conclusion that it cannot be done yet by users at home (becuase its CID is 52 ,and its a db2020 or something like that and it hasent been hacked yet)..
but people were saying it can be done online, so i went and checked and at wotanserver.com it cost be $10 Canadian(7 euro) to de brand it.
it was really simple and came with clear instructions and only took 10 mintues. so personally i suggest you do that and save your self the trouble .(as i looked for 2 days for a solution before paying someone)
anyway just my two bits