Mercedes-Benz GL-Class 2009 Owners Manual - Manual (Page 431)

Electrical system
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Electrical system
Model GL 320 BlueTEC GL 450
GL 550
Alternator 14 V / 220 A 14 V / 180 A
Starter motor 12 V / 2.0 kW 12 V / 1.4 kW
Battery 12 V / 95 Ah 12 V / 95 Ah
Spark plugs Type — NGK PLKR 7A
Electrode gap — 0.031 in (0.8 mm)
Tightening torque — 15 lb-ft - 18 lb-ft (20 Nm - 25 Nm)
Technical data
Z