Mercedes-Benz M-Class 2008 Owners Manual - Manual (Page 520)

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Technical data
Electrical system
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Electrical system
Model ML 350 ML 550 ML 63 AMG
Generator (alternator) 14 V/180 A 14 V/180 A 14 V/180 A
Starter motor 12 V/1.4 kW 12 V/1.7 kW 12 V/2.1 kW
Battery 12 V/70 Ah 12 V/95 Ah 12 V/95 Ah
Spark plugs Bosch Y7MPP33 NGK PLKR7A -
1
1 Contact an authorized Mercedes-Benz Light Truck Center.
Electrode gap 0.031 in (0.8 mm) 0.031 in (0.8 mm) 0.039 in (1.0 mm)
Tightening torque 15 – 19 lb-ft (20 – 25 Nm) 15 – 19 lb-ft (20 – 25 Nm) 15 – 22 lb-ft (20 – 30 Nm)
Model ML 320 CDI
Generator (alternator) 14 V/180 A
Starter motor 12 V/2.0 kW
Battery 12 V/95 Ah