2016 Superb Sportline TSI 280.
On two occasions recently, I've found petrol dripping out of the drain pipe and puddling near the rear wheel.
On both occasions, the car had been in direct sunshine on a hot day on a slight forwards incline.
The first time, the tank was 3/4 full (and the second time it was just over 1/2 full.
When I opened the filler cap, there was a gush of fuel followed by gurgling from the tank and drawing back of the brimming fuel followed by more gurgling and belching.
I'm guessing that there is a problem with venting but don't know what to check before parting with money for a mechanic to take a look.