390 Technical dataElectrical system
Mercedes-Benz SLR McLaren
Roadster
Mercedes-Benz SLR McLaren
Roadster 722 S
Generator (alternator)
14 V/150 A
14 V/150 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
NGK ILFR6A
NGK ILFR6A
Electrode gap
0.031 in (0.8 mm)
0.031 in (0.8 mm)
Tightening torque
18 – 22 lb-ft (25 – 30 Nm)
18 – 22 lb-ft (25 – 30 Nm)
