Mercedes-Benz 2003 SL 55 AMG - Manual (Page 339)

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Technical data
Electrical system
Electrical system
Model SL 500 SL 55 AMG
Generator (alternator) 14 V/150 A 14 V/180 A
Starter motor 12 V/1.7 kW 12 V/1.7 kW
Battery
Starter battery
12 V/35 Ah 12 V/35 Ah
Battery for electrical consumers 12 V/70 Ah 12 V/70 Ah
Spark plugs Bosch F 8 DPER
NGK PFR 5 R-11 NGK IL FR 6 A
Electrode gap 0.039 in (1.0 mm) 0.039 in (1.0 mm)
Tightening torque 15 – 22 ft.lb (20 – 30 Nm) 15 – 22 ft.lb (20 – 30 Nm)