ACMS,
the RTOW is one thing, but have a look at the DUS notams
316 T is all you are allowed to depart at...at least until the notam expires, which is before Sept 1, but you never know!
A0068/15 NOTAMR A5709/14Q) EDGG/QMRLT/IV/NBO/A /000/999/5116N00645E005A) EDDL B) 1501090509 C) 1504102359E) RWY 05R/23L LIMITED FOR B777, MTOW LIMIT 316T