2009 Mercedes SL-Class Owner's Manual - Page 350

Technical data Electrical system Electrical system Model Alternator Starter motor Starter battery Battery for electrical consumers Spark plugs Type Electrode gap Tightening torque SL 550 14 V / 180 A 12 V / 1.7 kW 12 V / 35 Ah 12 V / 70 Ah NGK PLKR 7A 0.031 in (0.8 mm) 15 lb-ft - 18 lb-ft (20 Nm - 25 Nm) SL 600 14 V / 180 A 12 V / 2.0 kW 12 V / 35 Ah 12 V / 70 Ah NGK IFR 6Q-G 0.028 in (0.7 mm) 18 lb-ft - 22 lb-ft (25 Nm - 30 Nm) SL 63 AMG 14 V / 180 A 12 V / 2.1 kW 12 V / 35 Ah 12 V / 70 Ah NGK ILZKAR 7A10 0.039 in (1.0 mm) 15 lb-ft - 18 lb-ft (20 Nm - 25 Nm) SL 65 AMG 14 V / 180 A 12 V / 1.7 kW 12 V / 35 Ah 12 V / 70 Ah NGK IFR 6Q-G 0.028 in (0.7 mm) 18 lb-ft - 22 lb-ft (25 Nm - 30 Nm) 348