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Driver assist systems
8.4 ANTI SLIP REGULATION (ASR)
8.4.1 Anti Slip Regulation (ASR)
ASR prevents the driven wheels from slipping when accelerating. ASR makes sure that
the vehicle remains stable when driving off on critical road surfaces (especially
accelerating when cornering). ASR is an addition to the EBS system.
When the driven wheels start to slip on one or both sides of the vehicle, ASR becomes
active. One or both wheel(s) is/are braked and/or engine power is decreased. In this
way, optimum traction is achieved.
If the ASR system intervenes, the warning indicator on the instrument
panel starts flashing.
Increased wheel slip
When the ASR switch is operated, increased wheel slip is permitted.
Below a speed of 45 km/h, the ASR control is adjusted so that more wheel slip is
permitted. This function can be used when driving on loose surfaces (for example sand,
gravel, snow). When the ASR switch is used to switch off the function, the ASR
disabled warning indicator on the instrument panel is visible.
8.5 DOWNHILL SPEED CONTROL (DSC)
8.5.1 Downhill Speed Control
Downhill speed control keeps the desired vehicle speed limits during descents.
Depending on the vehicle configuration, the downhill speed control function employs
braking torque using the engine brake or the retarder.
Engaging conditions
Downhill speed control can be engaged:
– when the vehicle speed exceeds 30 km/h (19 mph).
– when cruise control or vehicle speed limiter are engaged.
With Downhill speed control active an icon is visible in the speedometer
display.
DW63246305.book Page 263 Friday, March 22, 2019 4:54 PM
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