V70/1 – uneven braking / jerking!?

Hi, I have a workshop appointment tomorrow, but I would like to ask you about my problem for opinions, the following problem: My V70/1 slows unevenly, I don’t know if you can call it jerking, it’s like an imbalance and you really wiggle back and forth (that’s really hard to describe ). When I bought it almost 3 years ago it was extreme, then the brakes were made and it was almost gone, but only almost, never really. Now it’s become stronger again, just when you’re on the road longer and it’s warmer, it gets so extreme that the whole car vibrates, that’s really bad. Does anyone have any idea?