446 Technical dataElectrical systemModel
SLK 280
SLK 350
SLK 55 AMG
Generator (alternator)
14 V/150 A
14 V/150 A
14 V/150 A
Starter motor
12 V/1.4 kW
12 V/1.7 kW
12 V/1.7 kW
Battery
12 V/62 Ah
12 V/74 Ah
12 V/74 Ah
Spark plugs
NGK PLKR 6A
Bosch Platin Y 7 MPP33
NGK PLKR 6A
NGK IFR6D10
Electrode gap
0.031 in (0.8 mm)
0.031 in (0.8 mm)
0.039 in (1.0 mm)
Tightening torque
15 – 22 lb-ft (20 – 30 Nm)
15 – 22 lb-ft (20 – 30 Nm)
18 – 22 lb-ft (25 – 30 Nm)
