Application method: When the engine is cold, dismount the pressure sensor from the filter or disconnect the filter on the engine side. Shake can well before use. Insert the included tube as far as possible into this opening and spray until EMPTY in 3 to 5 times, each time with an interval of 5 minutes. Assemble everything back in its original state and let the engine idle for 5 minutes. If necessary, blow air through the vacuum tubes of the differential pressure sensor. Then make a test drive, so that regeneration is activated. If necessary, clear out the error codes from the memory of the vehicle.