Preparing test with quiescent current retention unit - AR54.10-P-1030-01P

WARNING: This page is about a different car, the 2009 Mercedes-Benz CLK350 and 2008 Mercedes-Benz CLK350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Electrical Connection Set (201 589 00 99 00)

Courtesy of MERCEDES-BENZ USA

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Number	Designation
WH58.30-Z-1001-09A	Multimeter
WH58.30-Z-1012-09A	Quiescent current retention unit

Connect the quiescent current retention unit (7) as follows:
- Connect clip on positive lead (+) to positive terminal on battery.
- Connect clip on negative lead (-) to battery ground point (W10).
Switch on quiescent current retention unit (7).
Shown on model 203

Fig 2: Connecting Current Retention Unit
Courtesy of MERCEDES-BENZ USA
Disconnect negative terminal clip on battery.
Connect multimeter (2) as follows using electrical connection set:
- Connect positive test cable (+) to negative battery cable (1).
- Connect negative test cable (-) to negative battery terminal (3).
  Shown on model 203
  
  Fig 3: Connecting Test Cables
  Courtesy of MERCEDES-BENZ USA
Switch on multimeter (2) (measuring range in amperes).
Switch off and disconnect quiescent current retention unit (7)
Route measurement cable (6) out of the engine compartment (on models 203, 209).
Shown on model 203.

Fig 4: Routing Measurement Cable
Courtesy of MERCEDES-BENZ USA