Diesel Engines: 190D
The EGR valve is operational under the following conditions:
- Coolant temperature must be between 77°F (25°C)-206°F (97°C).
- Engine speed 970-3020 RPM.
- Vehicle speed less than 54 MPH (87 Km/h).
- Accelerator pedal less than full throttle (a micro-switch shuts off the EGR system when full-throttle is reached).