138 Drivin g and OperationDriving hintsThe first 600 mil es (1000 k m)Drive your vehicle at v arious speeds.Do not use full throttle. Never allow theengine to labour at low revs.Make good use of all gea rs.Dep ress the acc elerator pedal a maxim umof approx. three quarters of the av ailablepedal travel in all gears.Do not drive faster than three quarters ofmax 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 (EPS ) 3). Driving in this manner isa d ang er to y ourself and others.Brak e servo unitWhen the engine is not running, the brakeservo unit is no longer effective once thefootb rake has been depressed onc e ortwice. Braking effect is not reduced, b utsignificantly greater force is required forbraking.Electri c Power Steering (EPS) 3If the Electric Power 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 n or with acarav an / trail erThe 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 w hile the v ehicle is still c op ingwith the gradient in the higher g ear.Dr iving with a roof loadDo not exceed the permissible roof load ,see p age 214. For reasons of safety,distribute the load evenly and secure itprop erly w ith retaining straps.Ad just tyre pressure to load conditions.Do not d riv e faster than 75 mph(120 km /h). Check and retighten the stra psfrequently. Observ e country-specificregulations.Sw itching off the engi neWhen y ou switch off, fans in the eng inecompa rtm ent may continue running for atime to cool the engine.If the engine temperature is very high, e.g.after driving in mountainous terrain:Allow the engine to id le for approx .two m inutes in order to prev ent heatacc um ulation.Vehicles with turbocharged engine:After 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 order toprotec t the turbocharger.Sa ve energy – m ore miles / kilom et resPlea se observe the running-in hints on theprevious pa ge a nd the tips for energysaving on the following pag es.Good, technically correc t and ec onomicaldriving ensures m aximum d urab ility andperforma nc e for your vehicle.