2008 Mercedes SL-Class Owner's Manual - Page 455

Technical data Electrical system Model Generator (alternator) Starter motor Starter battery Battery for electrical consumers Spark plugs Electrode gap Tightening torque SL 550 14 V/180 A 12 V/1.7 kW 12 V/35 Ah 12 V/70 Ah NGK PLKR7A 0.031 in (0.8 mm) 15 - 18 lb-ft (20 - 25 Nm) SL 600 14 V/180 A 12 V/1.7 kW 12 V/35 Ah 12 V/70 Ah NGK IFR6QG 0.028 in (0.7 mm) 18 - 22 lb-ft (25 - 30 Nm) SL 55 AMG 14 V/180 A 12 V/1.7 kW 12 V/35 Ah 12 V/70 Ah NGK ILFR6A 0.031 in (0.8 mm) 18 - 22 lb-ft (25 - 30 Nm) SL 65 AMG 14 V/180 A 12 V/1.7 kW 12 V/35 Ah 12 V/70 Ah NGK IFR6QG 0.028 in (0.7 mm) 18 - 22 lb-ft (25 - 30 Nm) 454