Hi i have moved to a new housen have whirlpool

Hi i have moved to a new housen have whirlpool oven there with no mannual. it has got 3 dials 1st says the Grill having 2 settings counting 1 to 4 with a single line n a double line.
2nd shows the temp
3rd shows the fan etc
Please tell me how to set the oven for baking a cake. I mean wwhich fan option i nedd to keep it at , n do i neet to set the knob saying grill on it onany one of the settings