Noticed that my 525i was shaking on low revs and while standing still so I opened the bonnet and noticed that half of the cooler fan-blades where smashed to pieces! Ever happened to you!? the car's only been driven 87k km so it shouldnt be old in any way... I'm also suspecting that it's running on 5 cyl instead of all 6 (shakey on low revs). Ever happened to any of you? Think the problem can be solved with a sparkplug change?