600SEL (140.057) V12-6.0L (120.980) (1993)
Battery: Testing and Inspection
Testing Battery Capacity (Load Test)
Preliminary work:
Checking state of charge, See: Check Condition of Battery
Quiescent current retention unit
disconnect, connect.
Battery
disconnect, reconnect. See: Service and Repair/Disconnecting and Connecting Battery
Battery
remove, install.
Electrolyte density
measure, min. 1.24 kg/dm cu; if electrolyte density <1.24 kg/dm cu, charge battery
NOTE: On vehicles with two batteries both batteries must be removed and tested separately.
Load test at 20 °C
perform.
Capacity/Ah
Load current/A
74
230
100
300
Battery minimum voltage
check, specification after 10 seconds approx. 10 V or >10 V.
If specified value is not reached, renew battery.
If specified value is reached, charge battery.
Electrolyte density
measure, specification 1.28 kg/dm cu.
Commercially available testers
Acidimeter
e.g. Hazet
Volt/ampere tester with load resistor
e.g. Hermann, Electronic
Quiescent current retention unit
e.g. Hans Zeheter CMP 12.2