So I have a baby coming soon and I need to put a car seat in the back. But my seat won't lock I try and force it shut but the latch won't lock into place. I don't want to put the car seat in with out it locking. I've looked all over the net and can't find a part number for my car. It's a 2001 audi a6 2.8L if anyone can help that would be great!