My sockets are 30mm tall and 3/8" drive. Good thing you checked your fill plug first!
The exact ones I have
TEKTON 3/8 Inch Drive x 23 mm 6-Point Socket | SHD12123 https://a.co/d/gm59Gx9
Capri Tools Shallow Impact Socket, 3/8-Inch Drive, 6-Point, Metric (24 mm) https://a.co/d/hFVATpL