The Ford and Benz were diesels or gas?I've had two different cars have issues: a Ford & a Mercedes.
It's a real PITA when you can't even run the pump on the first notch without it clicking off. Takes FOREVER to get a fill.
And yes, the problem was verified by the dealer, as having come from overfilling. Too expensive to have it corrected on the Mercedes, and I simply got rid of the Ford.