Loving the FL2 just about two weeks of ownership nearly 400 miles driven and the fuel gauge is reading just under 1/4 tank left... Bing fuel low warning and 43 miles left in the tank....is this normal .....

sounds about right to me, but mine does that at 300 miles

I agree
about 450 miles range mixed driving, low warning light comes on with 40-50 miles left. Tangiers Orange - gone, missing her
Replaced by Ewok what a mistake - now a happy Disco Sport owner

Filled mine last week when it told me I had 45 mile range left - it only fitted in 55 litres before the cut-out. I would expect more than 45 miles on 15 litres  GONE - '07 TD4 GS manual Zermatt Silver
LONG GONE - '55 Norton Dominator 99 SS cafe racer

I found after an extended traffic jam and closed services that the range indicator is a little optimistic - I started running out whilst indicating 5 miles remaining range.
It went into limp mode, I suspect due to low rail pressure. With a refill and reset all was well afterwards but it was a bit of a surprise to be caught out like that!

It goes into limp mode to preserve fuel. Cuts all turbo boost.

Depends on your driving style. I tend to get 500-530 miles from a full tank, and the low fuel warning comes on at 55 miles remaining. ...

Be true to yourself. That way happiness lies...