Vito crewbus brochure - Mercedes-Benz

Glossa r yElectronic Stability ProgramADAPTIVE ESP ADAPTIVE ESP is an innovative dynamichandling control system, whichfor the first time also takes the vehicleload into account. It actively interve nesin certain hazardous driving situations,e.g. if there is an imminent riskof skidding, by applying a brakingforce to one or more wheels and adjustingthe engine output as requiredso as to help the driver deal with thehazardous situation. As well as aidingdirectional stability, ADAPTIVE ESP combines the functions of the anti-lockbraking system (ABS), accelerationskid control (ASR), electronic brakeforce distribution (EBD), Brake Assist(BAS) and the optional Start-off assistsystem. ESP trailer stabilisation additionallyprovides for enhanced drivingsafety when towing a trailer.Caution:ADAPTIVE ESP can only act withinthe laws of physics. It is thereforeimpossible for ADAPTIVE ESP toprevent skidding resulting fromaquaplaning, for example. If the driverexceeds the physical limits, evenADAPTIVE ESP will not be able toprevent an accident!Electronic brake forcedistribution (EBD)Electronic brake force distribution(EBV) proportions the braking forcebetween the front and rear wheelsof the van as required, in order to optimisebraking efficiency in all drivingsituations. In this way the system prevents“overbraking” of the rear wheels,which could cause the tail to startsliding. At the same time EBV putsless stress on the front brakes, whichreduces the risk of fading due tooverheating.Brake Assist (BAS)In tests carried out in the drivingsimulator, our research engineersestablished that drivers do not applythe brakes vigorously enough duringemergency braking. This finding ledthem to develop Brake Assist. Fromthe speed at which the brake pedal isdepressed, Brake Assist is able todetect a situation where emergencybraking is required. In such a situationthe system automatically increasesbraking power, aided by theanti-lock braking system (ABS) whichprevents the wheels from locking up.Start-off assist (AAS)Start-off assist, an integral part of theESP which comes as standard onvehicles with automatic transmission,makes it easier to start off on uphillslopes: after the brake pedal is released,the brake pressure is maintainedfor approximately two seconds,allowing the driver to move theirfoot from the brake pedal to the acceleratorwithout having to worry aboutthe vehicle starting to roll. Start-offassist is activated on uphill slopes ofapprox. 4% or steeper. It is not activatedwhen starting off on the flat oron a downhill slope.Acceleration Skid Control (ASR)At the first signs of wheel spin, that isto say if the rotational speed of oneof the drive wheels suddenly increases,ASR intervenes in the engine managementsystem, reduces the enginepower and also intervenes via thebrake system to prevent extendedwheel spin. ASR ensures smoothstart-off and acceleration, withoutext ended wheel spin or sidewaysdrift. The result is improved traction– and safety – particularly on splitfrictionor slippery surfaces.40 Glossary