Service, maintenanc e156Top up anti-freeze. If no anti-freez e isava ilab le, top up with clea n ta p water.If tap water is unavailable, distilled watercan be used.After topping up with tap w ater or distilledwater, have the a nti-freeze conc entrationcheck ed, and anti-freeze a dded ifnecessary. Seek the assistance of aworkshop .When closing, tighten coolant filler cap asfar as it will go.Coolant tem peratureFor physical reasons, the enginetemperature gauge show s the coolanttemperature only if the coolant level isadeq uate. S ee page 63.During operation the system is pressurized.The temperature m ay therefore rise to over100 °C.If the tempera ture gauge enters theup permost zone, check the coolant lev el.z C oolant level too low:Top up coolant. Pay strict attention tothe instructions given under “Anti-freezeand c orrosion p rotection" and "C oola ntlevel". Have the cause of coolant lossrem edied by a workshop.z Where a substantial amount of coolant isreq uired, it will b e necessary to bleed a nytrapped air from the cooling sy stem.Seek the assistance of a workshop.z C oolant level OK :Hav e the cause of increased coolanttemperature remedied . Seek theassistance of a workshop .Brake fluidBrak e fluid level9 WarningAllow engine to cool d ow n beforeremoving coolant filler cap. Remove fillercap c arefully so that pressure c an escapeslowly, otherwise there is a risk ofscalding.9 Warnin gCaution - brake fluid is poisonous a ndcorrosive. Do not allow it to contact ey es,skin, fabrics or painted surfa ces. Direc tcontac t may cause injuries and damag e.