Problem with a MERCEDES E320 3.0L CDi 2006

Engine management light on and lack of power, fault code stored for turbo boost condition. 

The fault was cured by cleaning the turbo using the Forté Power-CleanDiesel Turbo Cleaner and carrying out an extended road test. The owner also reported a few weeks later that the turbo was working fine, and the fault had not returned.

Thanks to Prestwood Garage Ltd in Stourbridge, West Midlands.