I wondered the same thing on my Stelvio since I recently turned 30K miles. My operator's manual says the wrench icon will appear at 932 miles (1500 Km) and then every 6213 miles (10,000 Km) after that. I currently have 30,850 miles on the bike. Adding these numbers together, I expect my wrench icon to come on at near 31997 miles -- 932+6213+6213+6213+6213+6213. I expect the numbers are about the same for your Norge.