E30 Zone

I found out on this forum that you can view the amount of fuel remaining in the tank by pressing the bottom left and bottom right buttons on the OBC simultaneously. This displays the number of litres of fuel remaining on the OBC.

I also read somewhere that its accuracy can decrease over time and that you can reset it when you brim the tank so that when the tank is full, it registers the correct display in litres (is this making sense?)

Does anybody know how i can reset the litres remaining display when I go and fill it up tonight?

there is a small plastic lug on the bottom left of the obc ...remove it with a pin or something behind it you will find a v small screw you can turn the screw to adjust it but it does not change the reading much ...have you got the correct coding plug for your car press 1 and 100 and it will give the type then do a search on the zone and find if its the right one for your car