I tried to get mine fixed under warranty back in 2013 and was told there was no fix available. They all do that sir!
Love to know how they finally resolved the problem.
I'd love to know the fix for slow filling - it's the only negative of mine. It takes forever to fill. Seasons change whilst filling.
Contact Mark Evans at MMC, Parts / Service and don't let him say "they all do that Sir!' because they don't and he fixed mine.
I'm most surprised the fix hasn't been circulated to the dealers cos it's a real PITA of a problem.