Hello, during our "social distancing" my e53 has been sitting for about 5 or 6 days. Went to crank it up and it won't start. If I keep it cranking, I do smell gas. Sometimes I turn the key and it feels like it's about to catch. I'll stop and turn it again and it struggles. No consistency, it's slow to start turning over when I turn the key.

Here's a brief history of recent repairs:

June of 2018 : replaced the AIR MASS SENSOR
Feb. 2019 : replaced the FUEL PUMP ASSEMBLY and FUEL FILTER
April 2019 : I replaced the IGNITION COILS and SPARK PLUGS. Car was idling rough. The spark plugs were worn and aged.

I just tested my battery at Advanced Auto parts and they say it's good. It does take awhile to charge, however.

I checked fuses and relays, however I have not checked the Fuel Pump Relay behind the glove box. Not confident that's the problem since I changed it recently.

Any troubleshooting tips or theories?