Mercedes-Benz C, E, G, S, GLE and GLS with diesel engines OM654 and OM656 (2017–2021)
What the hazard is
If the coolant enters the vacuum circuit and comes in contact with certain components it will result in an increase in temperature of these components and may result in a vehicle fire. A vehicle fire increases the risk of injury or death to vehicle occupants.
What to do
Owners will be contacted and asked to contact their most convenient Mercedes-Benz dealership to have the work carried out as soon as possible at no cost. A full list of authorised dealerships can be found at www.mercedes-benz.com.au Alternatively, please use the Mercedes-Benz online booking service. www.mercedes-benz.com.au/servicebooking
Defect
A leak may develop between the coolant pump and the vacuum circuit. There is a possibility that the coolant may enter the vacuum circuit.