Recently purchased 2nd hand 735 and have discovered it handles woeful going around corners. Way too spongy and almost feels dangerous as it rolls around. The S EDC light goes on at start-up but goes out after around 5 seconds and pressing the EDC button won't light it again. Is there an easy way to see if some clown has played with suspension. Can I take this sort of job to a suspension shop or is it strictly BMW territory.