so i have a 2015 208 with the 82hp 1.2 engine. its only done 28,000 miles but has developed a loud knock/ rattle from underneath/right side of the car. it seems to be worse at low speeds but rough roads cause it the most. i thought it was a broken spring but after checking they all are fine. also had a mechanic check the suspension and all was fine. An exhaust bracket was broken but after getting it fixed the noise is still there but it does seem to not be as loud i think. the exhaust isn't loose at all now so it can't be that and it can't be suspension as it was checked and everything was tight. Any ideas of what it might be would be really appreciated.