Hello, I’ve been squeaking from the exhaust valve for some time now. Young stars guarantee does not take over, since it just squeaks and is not broken, it should be broken they may take over it, but must first be checked …. The flap only exists with the entire exhaust system – cost point 943€ -.- My question is now, should I wait until the flap gets stuck at some point and then to MB, with the hope that it is a guarantee case, or can cause a bigger damage to the ride ug arise when the flap is stuck. Unfortunately, don’t know me technically how this affects the car.. or just take the money in your hand and now take care of it yourself? I am grateful for every helpful answer. Lg stefan