hi guys just a quick question re my oil level light(orange one)came on a couple of days ago so I had a look. yeah fair play it was low ish! I topped it up to the right level but the light didn't go out 
so today I thought id do a mini service OIL FUEL AIR filters and oil 
all done topped up the  right levels and the light is still on?? 

Anyone got any ideas its freaking me out driving it whilst its on but i'm 100% sure there's the right amount in the engine?
ops sorry its on my 2006 GT TDI 170
cheer's guys