u/ToaOrbitoro

I highly recommend for anyone building the Audi Sport Quattro, when you get to step 100, simply switch out the 2 included turquoise pins for black LEGO Technic pins. The Mattel ones have ZERO friction (which is an odd choice since the tan ones in this same set seem to be the friction-ed version) meaning your trunk will easily fall down when it's open (which can scratch the bricks that it rests on) and it will also flop around if you move the car. The black Technic pins have more than enough friction to both support the trunk's weight and to hold it in any position in between fully open or closed, and to keep the trunk securely closed when in motion! Happy building!