Hi I just bought a 2006 automatic cvt Honda jazz 42000 miles today and had a short test drive before purchase, on the way home I noticed the car has a cracking like knocking sound coming from the bonnet I think and I didn’t notice it on the short test drive as the man was talking. Also a loose side mirror. I signed a 3 month warranty for engine and gearbox fault only. What do I do? Please I need advise as I have spent all my money on this car