Had the same message appearing on my idrive while driving. Immediately the car lost power and you couldn't drive fast and acceleration is worse than a Kancil. Quickly drove over to a mechanic and after plugging onto the computer, was told that its either the spark plug or ignition coil. Went the cheaper route first, took out the plugs and found that they were really dirty and burned out. After changing all 6 plugs, fault message in the computer still showed ignition coil for cylinder 6 has prob and engine was vibrating more than usual. Changed the faulty ignition coil as well and all the fault message and engine vibration were gone. Drove away a happy man again. Just to share with bros who may have the same fault message on their i-drive in future.