take the filter with the bowl off the header assembly and then you'll have more space/leverage to get the bowl off.
You can replace the oem filter and bowl with a wix filter, one of them has the built in bowl and the wif port. Those filters are more expensive than the oem, so if you can reuse your bowl, it's cheaper.
The wire on top of the assembly is for the heater, look for it to be wet. If it is, you'll need to replace the 2 o-rings in the heater itself (still haven't done mine).
What I;ve found is that mine sucks a little air when it sits more than a day, and it gets a bit hard to start. Waiting for warmer weather to pull it off. I'd get a shop to do it at this point, but it's hard to find a shop willing to do that job.... altho if my ip went out, I bet they'd find time to fit me in!