On the M25 today, crawling along as usual, outside lane .....I noticed an odd metallic tinking or rattle noise under gentle braking but I only heard it as my window was down, radio off and the noise was bouncing off the concrete crash barrier. I replaced all discs and pads 9000 miles ago with genuine Nissan OEM’s and do not drive the car hard or track it so they can’t be worn out already. Anybody else had a similar issue with their 370? Never heard this noise before and I’ve had the car 4 years.