Good evening

I have a new petrol Karoq, But after filling with fuel and completed over 100 miles, I noticed the petrol gauge has not reduced and the miles remaining has not changed. Any advice would be appreciated. 

Quite common.  
The float doesn't really move until about 70-100 miles if tank is filled, then will drop.

 

If you ever put in few litres (forget amount, but upto about 5 litres) doesn't always notice the change either, and shows same as before, when you restart.  

I can confirm that is normal. My fuel gauge usually moves after 70 or so miles from full.

Thanks for the reply. Gauge moved after approximately 120 miles.