It used to be the case that you could simply, quickly and easily check a car’s transmission fluid by looking at the transmission dipstick. In the case of the Holden Cruze, that’s not the case and clearly, the manufacturer doesn’t want anybody unauthorised attempting to check the fluid level. That and the fact that a transmission without a dipstick is cheaper to make. Without a dipstick, the fluid level is set when the transmission fluid is changed as part of a service. The transmission when refilled is then warmed to a pre-determined temperature and a small bung removed from the side of the transmission near the driveshaft. If the level is correct, there should be a drop of two of fluid leak from this hole. Clearly, this is not a job for the home mechanic, but that’s how a workshop does it. On the diesel-engined Cruze, the fuel filter is located in front of the driver’s side rear wheel, under the floor and next to the fuel tank. You may have to remove the plastic under-floor panels to gain access to the filter. In the petrol version of the Cruze, the filter is located in the driver’s-side rear wheel arch and, in either case, you’ll need to get under the car to change them, so make sure the car is safely supported.