Mercedes-Benz CLK-Class 2007 Owners Manual - Manual (Page 471)

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Technical data
Electrical system
Model CLK 350 CLK 550 CLK 63 AMG
Generator (alternator) 14 V/150 A 14 V/180 A 14 V/180 A
Starter motor 14 V/1.4 KW 14 V/1.7 KW 14 V/2.2 KW
Battery 12 V/100 Ah 12 V/100 Ah 12 V/100 Ah
Spark plugs Bosch Platin Y 7 MPP 33
NGK PLKR 6A Bosch F8 DPP 332
NGK PFR 5R-11 NGK T 20036N
Electrode gap 0.031 in (0.80 mm) 0.039 in (1.00 mm) 0.039 in (1.0 mm)
Tightening torque 15 - 22 lb-ft (20 - 30 Nm) 18.5 - 22 lb-ft (25 - 30 Nm) 14.75 - 18.5 lb-ft (20 - 25 Nm)