12 13 Carrying out engine cleaning (N54, N53, N43)
WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
When cleaning the engine, it is absolutely essential to keep the ignition coil covers fitted in order to protect the injectors.