Mercedes Benz C230 owners have reported 1 problem related to engine knocking noise (under the engine and engine cooling category). The most recently reported issues are listed below.
Periodically the car would lose acceleration and rpms would be high and the vehicle would jerk when I tried changing gears. As I change gears from park, reverse or drive, the gear shift jerks and I am unable to accelerate past 20 mph no matter how much pressure I place on the gas. : extreme loss of acceleration up hill and the steptronic (+/- shifting) did not work. . . (I could only go 35mph when every one else was going 70mph up hill) when I traveled on a flat surface with no inclination my car worked fine, I then decided to put it on neutral while traveling at 65mph. . . When I put it back in drive it did not pick up the gears it just continued as if it was in neautral. I had to pull over and shift it into park. . . As I shifted form "d" to neutral it shifted fine, but then from neutral to "r" the car jerked. . . From reverse to "p" it jerked again and shifted hard. I then shifted again to reverse, neutral, and drive thus the car jerked and did a hard shift with knocking noise and would not drive. I shifted to neutral again and shut the car off. When I turned it back on it shifted smooth and I drove off without any problem. Took it to a repair shop and received p0717/p0718 fault codes and something about the valve body. I was also told that it was an transmission internal speed sensor issue. There is something faulty with the design and operation of this model year transmission and losing power and being able to only go 35 mph no matter how much you press the gas on the interstate or heavy fast moving traffic is extremely dangerous. Mercedes benz is aware of this problem as many owners have complained but they will not institute a recall.
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all problems of the 2006 Mercedes Benz C230
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