If it is anything like my 2006 with abs, air in the servos was a right pain.
I had to leave my 1200 on her side overnight on a trail following a 'woops' moment. I woke up to a beautiful Greek morning, nicely rejuvenated, lifted the bike up only to find 'brake failure' flashing reds- my brake fluid had come out of the servos via the breather tube... front lever totally soft like yours.
All I had was residual and engine breaking all the way down the mountain and for a few hundred Kms to Athens where they used BMW specialised equipment to suck new fluid and get rid of air... 
You should find a bleed nipple in the wheel arch but then you'll need the BMW special kit to vacuum the system so... it's go to the dealer time IMHO. Good luck and... bring your wallet!
I soooooo bless the day I sold mine and kept my F650 Dakar- brake fluid flush and renew + pads replaced all under an hour easy-peasy by the side of my tent.
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