Have you put it in the right mode , diesel A or B ?
There's an explanation of how to check that in the manual.
Then, you need to calibrate the Scangauge to the car - and your driving style to some degree - again, instructions on how to are in the manual.
When you correct the amount you filled up against what the SG thinks you used, correct it only half-way towards the right number to avoid overcorrection swinging the other direction.
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Strayed to the Dark Diesel Side
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