Mercedes-Benz SL-Class - Manual (Page 430)

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Technical data
Electrical system
Model SL 500 SL 600 SL 55 AMG SL 65 AMG
Generator (alternator) 14 V/150 A 14 V/180 A 14 V/180 A 14 V/180 A
Starter motor 12 V/1.7 kW 12 V/1.7 kW 12 V/1.7 kW 12 V/1.7 kW
Battery
Starter battery 12 V/35 Ah 12 V/35 Ah 12 V/35 Ah 12 V/35 Ah
Battery for electrical consumers 12 V/70 Ah 12 V/70 Ah 12 V/70 Ah 12 V/70 Ah
Spark plugs Bosch F 8 DPER
NGK PFR5R11 NGK IFR6QG NGK ILFR6A NGK IFR6QG
Electrode gap 0.039 in (1.0 mm) 0.028 in (0.7 mm) 0.031 in (0.8 mm) 0.028 in (0.7 mm)
Tightening torque 15 – 22 lb-ft
(20 – 30 Nm) 15 – 22 lb-ft
(20 – 30 Nm) 18 – 22 lb-ft
(25 – 30 Nm) 15 – 22 lb-ft
(20 – 30 Nm)