Engine misfires (rough running) and lack of power are commonly caused by ignition coil pack or ignition module faults. Proper diagnoses should isolate the cause and prevent unnecessary replacement of good parts.Google+
Car Problem Reports
Mercedes-Benz CL65 AMG Rough Running Motor/Lack of Power Due to Coil Pack/Ignition Module Failure
Mercedes-Benz CL65 AMG Problem
Average Mileage: 60,611 mi (51,000 mi - 70,223 mi)
Visitor, 2005 Mercedes-Benz CL65 AMG, 70,223 mi
Replaced both coil packs @ $1400.00 each ($2800.00) 24 NGK Iridium Spark Plugs @$20.00 each x 24 ($480.00) Plus labor & sales tax.. Then replaced both catalytic converters with OEM Mercedes and O2 Sensors $2600.00+ Labor. & tax and car runs worst then anything I ever owned and no one can figure this shit out!!! WTF!! Is the problem!! Drove the car only 5,000 miles since I bought it in August 2013 .. Oh almost forgot $3000.00 for New front Airmatic struts for the front!! Unbelievable!!!
Visitor, 2005 Mercedes-Benz CL65 AMG, 51,000 mi
new coil pak on drivers side was installed. It cost about 2000 for the service.