Mercedes-Benz S-Class 2008 COMAND Manual - Manual (Page 761)

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Technical data
Electrical system
Model S 450 4MATIC 1
1 Canada only
S 550
S 550 4MATIC S 600
Generator (alternator) 14 V/220 A 14 V/220 A 14 V/220 A
Starter motor 12 V/1.7 kW 12 V/1.7 kW 12 V/1.7 kW
Starter battery 12 V/35 Ah 12 V/35 Ah 12 V/35 Ah
Electrical consumer
battery 12 V/95 Ah 12 V/95 Ah 12 V/95 Ah
Spark plugs NGK PLKR 6A
Bosch Y 7 MPP 33 NGK PLKR 6A
Bosch Y 7 MPP 33 NGK IFR 6Q-G
Electrode gap 0.031 in (0.8 mm) 0.031 in (0.8 mm) 0.028 in (0.7 mm)
Tightening torque 15 – 18 lb-ft (20 – 25 Nm) 15 – 18 lb-ft (20 – 25 Nm) 18 – 22 lb-ft (25 – 30 Nm)