There are on many newer cars quite a lot ot the fuel venting and tank filling stuffs, for 986/996 Porsche for example they actually have a magnetic switch that senses the fuel filler nozzle going in the neck and opens a venting valve(one of several), when it fails you can't put fuel in the thing basically. Plenty fixable but can be an annoyance without service info or a lift depending on how it's set up. Joys of newer cars..

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K