G12�Driver�Assistance�Systems
18.�Parking�Maneuver�Assistant
118
18.7.3.�Deactivation�criteria
Manual�deactivation�criteria
The�Parking�Maneuver�Assistant�PMA�can�be�deactivated�at�any�time�if�necessary�by�the�driver�via
the�controller�by�selecting�the�corresponding�symbol�in�the�symbol�bar�on�the�Central�Information
Display�CID.�Another�way�to�deactivate�the�Parking�Maneuver�Assistant�PMA�is�to�release�the�parking
assistance�button�in�the�switch�block�next�to�the�iDrive�controller.
If�a�fault�develops,�a�Check�Control�message�("The�PDC�has�malfunctioned.�Have�system�checked.")�is
displayed�in�the�Central�Information�Display�CID.
Automatic�deactivation�criteria
The�Parking�Maneuver�Assistant�PMA�is�switched�off�automatically�when�the�following�events�occur:
• the�parking�assistance�button�is�released
• the�driver�holds�on�to�the�steering�wheel�or�steers�himself
• a�gear�is�selected�that�does�not�correspond�to�the�instruction�on�the�control�display
• when�accelerating
• the�parking�brake�is�secured
• the�turn�indicator�opposite�the�required�parking�side�is�switched�on
• at�speeds�above�about�10km/h
• possibly�if�the�roadway�is�covered�with�snow�or�is�slippery
• the�tailgate�is�open
• possibly�if�the�objects�are�difficult�to�overcome,�e.g.�curbs
• if�obstructions�suddenly�appear
• a�maximum�number�of�parking�maneuvers�or�the�parking�duration�has�been�exceeded.
18.8.�Limits�of�the�system
The�detection�of�objects�can�test�the�ultrasonic�measurement�system�to�its�limits.�Several�examples�of
this�are�shown�below:
• with�trailer�towbars�and�couplings
• if�the�objects�are�thin�or�wedge-shaped
• if�the�objects�are�projecting�and�elevated,�e.g.�wall�projections�or�loads
• if�the�objects�have�corners�and�sharp�edges
• if�the�objects�have�fine�surfaces�or�structures,�e.g.�fences.
Low�objects�that�are�already�displayed,�e.g.�curbs,�may�fall�within�the�blind�spot�of�the�sensors�before
or�after�a�continuous�alarm�sounds.�It�would�not�be�possible�to�detect�objects�that�are�higher�up�and
projecting,�e.g.�wall�projections.�Parking�spaces�may�be�detected�although�these�are�not�suitable.
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