Hi I'm kinda new to Audi , so I bought a 98' A4 Quattro 2.8l v6 a while back and man let me tell u I love it . It's ran like a dream up until around 2 weeks ago . That was the alternator and what a pain in my a#% . But now it's having another issue this one kinda stumps me . The rpm drop when breaking / come to a stop and also when in first gear and you accelerate it has this rattle sound from under the hood and help would be much appreciated 👍