They (ESS) finished for E70 4.8is -- e53 no-where near done.. and I just received email from Asbjorn from ESS - he says "We have not had time to complete the E53 version yet" -- when I asked him when - he said hopefully before end of 2013... So maybe i'll come out in 8-9 months - maybe not.. Who knows... Ive been waiting on ESS for so long I am losing my patience and might just upgrade to a X5M by next year