These transmissions fail in rare cases when water enters the transmission via the oil cooling lines or the radiator on cars equipped with Valeo radiators. Very few Mercedes-Benz cars have had complete transmission failure and require transmission replacement. These independent shops will take your old 722.9 transmission control module and try to repair it. An alternative solution is to try a Mercedes-Benz 7G 722.9 conductor plate repair service. You will either need to get a new valve body which gets expensive considering that it will also require programming.
2002 MERCEDES BENZ C230 KOMPRESSOR PROBLEMS INSTALL
If your Mercedes-Benz is equipped with the 722.9, you can’t install a used valve body because the transmission control unit is part of the valve body. But because valve body failures are so common, you will find them on Amazon for a lot less see Mercedes-Benz valve body listings here. A new valve body at the dealer can cost between $500 and $1000. This means you can do this repair yourself if you are willing to get under the car. Luckily for you, the transmission does not need to be removed. Replacing the valve body can perform with the transmission in place. The transmission does not need to be removed.
The valve body is inside the transmission. If you still have issues with the car going into limp mode and the scanner points you toward the valve body, you may consider replacing it. You agree to use this information at your own risk by continuing to read this article. Now let’s see if we can help you troubleshoot your transmission. The 5-speed transmission that was used between 1995 to 2008 is one of the best transmissions ever built. Mercedes-Benz transmissions are very solid, and whole transmission replacement is rarely needed. These are easy fixes that you can even tackle yourself. You would be surprised to know that most transmission problems, such as hard shifting and no shifting issues, come from incorrect transmission fluid level or the infamous transmission 13-pin connector plug O-ring. Don’t forget that first warning! It would be best to discover why your transmission is going into limp mode or not shifting. If you ignore them, the car will go into limp mode more frequently. Your transmission may be back to normal, but there may be underlying issues that you need to address.
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