108 Drivin g and OperationDriving hintsThe first 600 mil es / 1000 kmDrive your vehicle at v arious speeds.Do not use full throttle. Never allowthe engine to lab our at low revs.Make good use of all gea rs. Depressthe a ccelerator peda l a max imum ofabout 3 /4 of the available pedal travelin all gears.Do not drive faster than three quartersof max imum speed.Do not brake unnecessarily hard for thefirst 125 miles (200 km ).Never coa st with engine not runningMany units will not function in this situation(e. g. brak e serv o unit, elec tric powersteering). Driving in this manner is a dangerto yourself and others.Brake servo unitWhen the engine is not running, the brakeservo unit is no longer effective once thebrake peda l has been depressed once ortwice. Braking effect is not reduced , butsignificantly greater force is required forbraking.Electri c power steeringIf the power-assisted steering fails whenbeing towed with the engine switched off,the vehicle can still be steered, butconsidera bly more forc e is req uired.Dr iving in mountainous terrai nThe cooling fan is electrically operated. Itscooling p ow er is therefore independent ofthe engine speed.Since a considerable amount of heat isgenera ted at high engine speeds and lessat slower speeds, do not shift d ow n whenclimbing hills whilst the v ehicle is still copingwith the gradient in the higher g ear.Sw itching off the engi neWhen y ou switch off, fans in the eng inecompa rtm ent may continue running fora tim e to c ool the engine.If the engine temperature is very high, e.g.after driving in mountainous terrain: Allowthe engine to id le for approx im ately twominutes in order to prevent heatacc um ulation.Vehicles with turbocharged engineAfter running at high eng ine speeds or higheng ine loads, op erate the engine briefly ata low load or run in neutral for approx.30 seconds before switching off in orderto protec t the turbocharger.Sa ve energy – m ore milesPlea se observe the running-in hints on thethis pa ge and the tips for sav ing energy onthe following pa ges.Good, technically correc t and ec onomicaldriving ensures m aximum d urab ility andperforma nc e for your vehicle.