Notes for Service: Guard

If the temperature of the coolant or of the engine oil becomes excessive during engine operation, certain functions in the vehicle are influenced in such a way that the engine cooling has more energy available.

The measures are divided into 2 operating modes:

1. Guard
   • Coolant temperature between 117 °C and 124 °C
   • Engine oil temperature between 150 °C and 157 °C.

   Measure: power reduction of the climate control (up to 100 %) and of the engine.

2. Emergency
   • Coolant temperature between 125 °C and 129 °C
   • Engine oil temperature between 158 °C and 163 °C.

   Measure: power reduction of the engine (up to approx. 90%).

Technical modifications may be introduced at any time. Observe model-specific diagnostic information and any applicable service bulletins for updates.