Table 1 shows one common engine and engine cooling related problems of the 2006 Mercedes Benz C Class.
| Problem Category | Number of Problems |
|---|---|
| Engine Knocking Noise problems |
: the contact stated while traveling various speeds, there was a knocking sound coming from the engine compartment. The dealership was unable to duplicate the problem. The brake pedal shakes while depressed. The dealership determined this was normal operating conditions.