If you’ve been noticing erratic gas gauge behavior — the needle moving up and down more frequently and not giving you a steadily decreasing reading, or the needle seeming to get stuck — you may want to have your fuel meter assembly checked out. This is the mechanism that works the needle on the dashboard. It’s not necessarily an indication of an actual fuel consumption problem.
However, without a working needle, you’ll have more trouble telling if something is starting to go wrong with your actual mileage. You’d have to be very careful to fill up your tank frequently, and if the gas pump were to under-fill (sometimes they shut off early), then it might look like you’re having trouble with mileage. Contact Brookdale Volkswagen to have an erratic gas needle checked out instead.