| Where can I find the ignition coils specs for 2004 CLK320
I am looking for the specs for the coils for my 2004 CLK320. The car has 57k miles, auto trans, with new spark plugs, air filters, MAF sensor, fuel filter. This car is acting up only during low speed from 20mph to 40mph. The whole rear end of the car vibrates, as if it is driving over railroad tracks or rumbling strips. It feels like engine is missing during slight acceleration only. On highway, or any speed over 40mph is perfect. I have checked all the motor mounts, trans mount, bushings in the rear and etc... I have read and inspected the infamous "coolant leaks in radiator" issue. My car in a 11/03 model with a Behr radiator. I am thinking one of the coils maybe bad.....then again why there is no codes if the coil is bad??? Now I hope is the coils or else the transmission is my next area I am looking into. | 
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