Audi A4 B8 owners manual page 229

text version of content this owner's manual page from owners manual to the vehicle Audi A4, year of production 2008 - 2015:

document_0900452a81b1b9de.book Seite 227 Donnerstag, 26. Juli 2007 9:16 09 Intelligent technology 227 current even when the ignition is off. In some cases there may not be enough power available to start the engine. Note Your vehicle is equipped with an intelligent power management • The power management system is not able to overcome the system to control the distribution of electrical energy. This signifi-given physical limits. Please remember that the power and life of cantly improves reliability when starting the engine, and also the battery are limited. prolongs the life of the battery. • A warning message will appear ⇒ page 228, “Driver message in The main functions incorporated in the power management system the instrument cluster display” if the battery power has dropped to are battery diagnosis, residual current management and dynamic a level where reliable starting is impaired. power management. Battery diagnosis Points to remember The battery diagnosis function constantly registers the condition of Starting ability has first priority. the battery. Sensors detect the battery voltage, battery current and Short trips, city traffic and low temperatures all place a heavy load battery temperature. This enables the system to calculate the on the battery. In these conditions a large amount of power is current power level and charge condition of the battery.consumed, but only a small amount is supplied. The situation is also Residual current management critical if electrical equipment is in use when the engine is not The residual current management reduces power consumption running. In this case power is consumed when none is being gener- while the vehicle is parked. It controls the supply of power to the ated. various electrical components while the ignition is switched off. The In these situations you will be aware that the power management system takes the battery diagnosis data into consideration.system is intervening to control the distribution of electrical power. Depending on the power level of the battery, the individual electrical When the vehicle is parked for long periods components are switched off one after the other to prevent the If you do not drive your vehicle for a period of several days or weeks, battery from losing too much charge and to ensure that the engine the power management will gradually shut off the on-board can be started reliably. systems one by one, or reduce the amount of current they are using. Dynamic power management This limits the amount of power consumed and helps to ensure reli- While the vehicle is moving, this function distributes the available able starting even after a long period. power to the various electrical components and systems according Please note that certain convenience features, such as the Audi to their requirements. The power management ensures that on-advanced key*, the remote control key or the electrical seat adjust- board systems do not consume more electrical power than the ment may not be available when yo u unlock the vehicle. These func- alternator can supply, and thus maintains the maximum possible tions will be restored when you switch on the ignition and start the battery power level. engine. Controls Safety Driving tipsGeneral maintenance Self-help Technical data

owners manual Audi A4

owners manual Audi A4 - year of production: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 - Audi A4 B8 owners manual EN