Hi, I recently bought my 2008 3.6 TDV8 L320 and the engine management light came on as soon as I got home, I had someone do a free diagnostic test as I'm a key worker but now all I have is fault codes and no real idea of what could be causing the issue? Every now and then on start up, the car will shake, smoke and if you touch the throttle, it drops the revs... turn off and back on again and it runs perfectly. Also the suspension keeps releasing air and filling back up again constantly, makes me jump every time I get out the car because it sound like I've had a blow out. I can attach the diagnostic report if needed, many thanks for your time.