239Self-helpz Take the spare wheel from the luggagecompartment.z Before raising the vehicle, set the frontwheels to the straight-ahead position.z Slacken the wheel bolts one half turnbefore raising the vehicle, but do nottotally unscrew the bolts.z Never change more than one wheel atonce.z Block the wheel diagonally opposite thewheel to be changed by placing wedgeblocks or equivalent in front and behindthe wheel.z Use the jack only to change wheels.z If the ground on which the vehicle isstanding is soft, a solid board (max. 1 cmthick) should be placed under the jack.Using a thicker board could damage thejack and the vehicle.z Apply a light coating of grease to thecone of each wheel bolt before screwingin the wheel bolts after a wheel change.Some normal commercial grease will berequired for this purpose. Werecommend your Vauxhall AuthorisedRepairer.z No people or animals may be in thevehicle when it is jacked up.z Never crawl under a jacked-up vehicle.z Do not start or run the engine while thevehicle is on the jack.z Fully tighten the wheel bolts afterlowering the vehicle all the way.Picture no: 17743j.tif1. Prise off the wheel trim using the hookincluded with the vehicle tools 3. Forvehicle tools, see page 238.If the wheel trim has visible wheelbolts 3, the trim can remain on thewheel. The retaining washers 3 on thewheel bolts must not be removed.