BMW G12 Product Information page 99

G12￿Driver￿Assistance￿Systems
16.￿Park￿Distance￿Control
16.7.￿Limits￿of￿the￿system
Due￿to￿the￿physical￿limits￿during￿the￿ultrasonic￿measurement,￿obstructions￿may￿not￿be￿detected￿by￿the
Park￿Distance￿Control￿system.￿Several￿examples￿of￿this￿are￿shown￿below:
• if￿the￿objects￿are￿thin￿or￿wedge-shaped
• when￿the￿objects￿are￿low
• when￿objects￿that,￿due￿to￿their￿shape,￿have￿corners￿and￿sharp￿edges
• with￿snow
• if￿the￿objects￿have￿a￿porous￿surface.
A￿warning￿may￿also￿be￿displayed￿although￿there￿is￿no￿obstruction￿in￿the￿detection￿range.￿This￿may￿be
the￿case￿in￿the￿following￿situations:
• when￿it￿is￿raining￿heavily
• if￿the￿sensors￿are￿heavily￿soiled￿or￿iced￿over
• if￿the￿sensors￿are￿covered￿with￿snow
• if￿the￿street￿surface￿is￿rough
• if￿there￿are￿bumps,￿e.g.￿speed￿bumps
• in￿large￿right-angled￿buildings￿with￿smooth￿walls,￿e.g.￿underground￿car￿parks
• due￿to￿heavy￿exhaust￿gas￿fumes
• due￿to￿other￿ultrasound￿sources.
To￿ensure￿the￿ultrasonic￿sensors￿remain￿fully￿operational,￿they￿must￿be￿kept￿clean￿and￿free￿of￿ice.
When￿cleaning￿the￿sensors￿using￿a￿high￿pressure￿cleaner,￿avoid￿direct￿and￿sustained￿contact￿with￿a
high-pressure￿water￿jet.￿Furthermore,￿when￿using￿high￿pressure￿cleaners,￿a￿distance￿of￿at￿least￿30 cm
from￿the￿sensors￿must￿be￿maintained.
The￿Park￿Distance￿Control￿cannot￿replace￿the￿driver's￿personal￿judgement￿of￿the￿traffic￿situation.￿Also
check￿the￿traffic￿situation￿around￿the￿vehicle￿by￿looking￿around,￿otherwise￿there￿may￿be￿a￿risk￿of￿an
accident￿as￿a￿result￿of￿road￿users￿or￿objects￿which￿lie￿outside￿the￿detection￿range￿of￿the￿Park￿Distance
Control.￿Loud￿sound￿sources￿outside￿and￿inside￿the￿vehicle￿could￿drown￿out￿the￿PDC￿signal.
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