MercedesBenz SClass Singlebattery onboard electrical system C216 W221

YOUR LINK HERE:

http://youtube.com/watch?v=hDbf0R9-sZY

The on-board electrical system management of model series W221 was changed for modification year 08. • A new single-battery on-board electrical system is installed. • The on-board electrical system battery is no longer located in the trunk. • It has taken the place of the starter battery in the engine compartment. • The battery sensor is located on the ground terminal. • The battery sensor is connected to the driver-SAM via a LIN bus line. • This is located under the engine control unit. • On gasoline engines, the driver-SAM is installed in the control unit box. • On diesel engines, it is located under the engine control unit. • The SAM contains the on-board electrical system management software. • This controls the on-board electrical system functions. • The modified engine compartment with the on-board electrical system battery is shown on the left. • The engine compartment of an S-Class before the modification is shown on the right. • Instead of the on-board electrical system battery, the starter battery is still installed here. • The new single-battery on-board electrical system consists of the on-board electrical system management software in the SAM,... • ...the no-load current switch in the prefuse box... • ...and the intelligent battery sensor. • Together with the driver-SAM, the battery sensor is responsible for on-board electrical system management. • In critical on-board electrical system situations, measures can be initiated in order to stabilize the on-board electrical system. • These include dynamic idle speed control,... • ... consumer reduction,... • ... temperature-controlled charging voltage regulation, ... • ... no-load current optimization by means of no-load current switches... • ... and the battery quick charging function. • STAR DIAGNOSIS is used to read out the battery sensor and check the no-load current. • This is the same as on model series 204. • New: The data records of the battery sensor are no longer overwritten. • This does not happen either when the ignition is switched on or off. • The original data record is not overwritten until the vehicle is driven 100 m. • Exception: Entries generated due to high no-load current. • In this case, a new data record can still be created at the same kilometer reading. • Start the no-load current test via the driver-SAM. • Select 'On-board electrical system'. • Select 'Actual values'. • Select 'Current data of battery sensor'. • Select 'Battery current'. • Select 'No-load current behavior. • The last data records can be viewed here. • The no-load current can be read off. • When a data record is selected, the system displays the kilometer reading at which it was stored. • When charging the new single-battery on-board electrical system it is important that • only chargers with a charging current of at least 30 A are used. • Never charge the battery directly via the negative terminal of the battery. • Otherwise, the charging current will not flow through the intelligent battery sensor. • In addition, the system would still operate based on the old charge state of the battery. • Correct: Attach positive clamp to positive terminal of battery. • Alternatively, attach to the long-terminal stud on the prefuse box. • Attach the negative clamp to the front ground bolt on the wheel arch. • The charging current now flows through the intelligent battery sensor and is monitored. • Special considerations for jump starting: • The positive terminal point is not suitable for jump starting. • The contact pressure of the clamp is not adequate. • This can result in a high voltage drop during jump starting. • The clamp must therefore be clamped to the positive terminal of the battery. • The clamp for the negative terminal should still be connected to the ground terminal stud. • A correctly charged battery supplies all consumption points with power. • It ensures that the engine can be started. • If the on-board electrical system battery fails, the backup battery provides support. • The backup battery is installed behind the rotary light switch. • If the on-board electrical system battery fails, the backup battery activates the park pawl on vehicles with shift-by-wire. • The prefuse box houses another new technical feature. • It is located in the footwell of the front passenger seat. • It forms a node for power distribution to the vehicle interior. • The no-load current switch is also integrated inside it. • If necessary, it switches off circuit 30 G. • This takes place in three scenarios: • Firstly: The engine has been off for longer than six hours. • Secondly: The on-board electrical system voltage drops below 11.8 V. • Thirdly: The no-load current exceeds a value of 75 mA after approx. 75 min. • • ------------------------------------------------------------------------------------- • instagram: • / mbownersclub • twitter: • / mb_owners

#############################

New on site