I know you had new coil packs fitted but it may still be worth live logging of your misfire count (blocks 015 and 016). I would also suggest you log block 103 (low-side feed pressure from the tank).When did you last change your plugs?
Sounds like my ongoing fault.http://www.mk5golfgti.co.uk/forum/index.php/topic,29851.0.html
Sure it has already been checked, but is the air intake fitted properly after the engine cover was refitted, mine stalled as the connector pipe was slightly loose and not allowing the correct amount of air into the engine.