221Make sure that the highlycorrosive brake fluid doesnot drip onto the paint-work. If it does, wash it off imme-diately with water.Loosen cap A holding sensor B still.The fluid level in the reservoir shouldnever exceed the MAX reference line.IMPORTANT Brake fluid is hygro-scopic (meaning it absorbs humidity).This is why the fluid should bechanged more frequently than shownin the Service Schedule if the car ismainly driven in areas with a highpercentage of humidity in the air.The air cleaner replace-ment procedure is pro-vided for indicative pur-poses only. Have the operationcarried out at a Lancia Dealership.Car safety can be compromised ifthe cleaner replacement procedureherein described is not carried outcorrectly.Replace the air cleanermore frequently than shownin the Service Schedule ifthe car is used on dusty roads.The cleaner can be dam-aged if it is cleaned andconsequently the enginecan be damaged.The symbol π on thecontainer indicates syn-thetic brake fluid distin-guishing it from mineral fluid. Us-ing mineral type fluid would dam-age the special rubber brakingsystem gaskets beyond repair.fig. 16P4T0174AIR CLEANERThe air cleaner is connected to theair temperature and intake sensorswhich send the electrical signals re-quired for the correct operation of theinjection and ignition system to thecontrol unit.Consequently, the cleaner must al-ways be in perfect conditions to en-sure correct operation of the engineand in order to contain consumptionand exhaust emissions.REPLACEMENT (fig. 16)Loosen the screws A, lift the cover Band remove the filtering element to bereplaced.