5 Trouble Shooting
Description of problem
What to do
No noticeable fuel
savings
I do not notice any fuel
savings
• Make sure you are comparing before-and-after fuel
consumption based on the vehicle’s actual consumption – on-
board computers often display incorrect values.
• It is important that your driving style remains the same, i.e.
you do not accelerate harder or drive fast more often than
before. You will not see any fuel savings either if you often
drive at or near maximum load – you need to adopt an
economical driving style at least some of the time in order to
save fuel.
• If your driving style matches the description but you still
do not see any fuel savings, please select the next highest
mapping (see Fine tuning, section
B
). After selecting a new
mapping, check the actual consumption to see if there has
been any reduction.
E
