239Self-help, vehicle care6. Change the wheel. For notes ontemporary spare wheel – see page 234.7. Screw in wheel bolts and tighten slightly,inserting the wheel bolt wrench 3 as faras possible.8. Lower vehicle.9. Tighten wheel bolts crosswise, putting onwheel bolt wrench 3 as far as possible.10. Before refitting the wheel trim, clean thewheel around the retaining clips. Valvesymbol 3 on back of wheel trim mustpoint towards valve on wheel.Align and refit wheel trim or wheel boltcaps 3.Alloy wheels 3: Align and refit wheelbolt caps 3.11. Stow replaced wheel, tools and warningtriangle in luggage compartment – seepages 232, 233 and 235.12. Check the tyre pressure of the newlymounted wheel. Correct if necessary.13. Have the tightening torque of the wheelbolts on the new wheel checked on thevehicle using a torque wrench as soonas possible and, if necessary, corrected.Tightening torque – see page 288.14. Replace the faulty tyre on the wheelthat was removed.15. Replace temporary spare wheel with afull specification wheel without delay.Tyre repair kit 3Minor damage to the tyre tread or sidewall, e.g. from foreign bodies, can berepaired using the tyre repair kit.Do not remove the foreign body from thetyre.Tyre damage exceeding 4 mm or that is onthe rim cannot be repaired with the tyrerepair kit.Important information – see page 243.In the event of a flat tyre:z Switch on hazard warning lights,apply hand brake; for automatictransmission 3, move selector lever to P;for manual transmission or Easytronic 3,select 1st or reverse gear.z Correctly set up the warning triangle.Warning triangle – see page 235.9 WarningDriving with tyre pressures too low ortyres deflated can cause invisibledamage to the tyre. This damage cannotbe eliminated with a tyre repair kit. Parkthe vehicle and contact a workshop.