Is the child booster seat large? I rented an Audi A4 Avant, I don't know if two adults can sit in the back after using the booster seat ?
2 Answers

My own car is A4, so it should be structurally similar! The elevated seat cushion occupies a regular position, and you can sit on it if you really want to, but it will be very cramped.

Sure, the child growth pad does not protrude to the left or right, but only increases in height. You can search for booster seat to see what it looks like from the pictures.