i have a 2002 C230 Mercedes Coupe Kompressor, it is showing these error codes: 4300 (CAN communication is faulty). 4310 (CAN communication with traction system is faulty). 4311(CAN communication with engine is faulty). 4312 (CAN with the engine is faulty or engine temp. is unplausable). 4600(the voltage supply of Circuit 87 has under voltgage). Car runs smooth but won't shift. what could be causing all these CAN errors?

If the car is an automatic..you said it wouldn't shift then the shifter (it is a computer) is the most likely cause.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Could it be the electrical connector at the transmission?

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

yes it's an automatic. sorry i forgot to say.