Replacing the torque converter on a Mercedes-Benz C-Class 220 W203 is a complex task that requires a good understanding of automotive systems, as well as mechanical skills. click here for more details on the download manual…..
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Below is a detailed guide on how to perform this replacement, including descriptions of necessary tools and components.
### Tools and Equipment Needed:
1. **Basic Hand Tools**:
– Socket set (metric sizes)
– Wrenches (metric sizes)
– Screwdrivers (Phillips and flathead)
– Pliers
– Torque wrench
– Hammer
2. **Specialty Tools**:
– Transmission jack or regular jack with a transmission adapter
– Engine support bar (if applicable)
– Drain pan
– Oil filter wrench
3. **Replacement Parts**:
– OEM Torque converter
– New transmission fluid (ATF suitable for Mercedes-Benz)
– Transmission pan gasket
– Transmission filter (optional but recommended)
– Sealing washers for bolts (if applicable)
4. **Safety Equipment**:
– Safety glasses
– Gloves
– Mechanic’s creeper (optional but helpful)
### Preparation Steps:
1. **Safety First**: Ensure the vehicle is on a flat surface. Engage the parking brake and use wheel chocks for additional safety.
2. **Disconnect the Battery**: Remove the negative terminal from the battery to prevent any electrical shorts.
3. **Drain the Transmission Fluid**:
– place a drain pan under the transmission pan.
– Remove the transmission pan bolts and carefully lower the pan to drain the fluid.
– Note the condition of the fluid; dark or burnt fluid may indicate other issues.
### Removal Steps:
1. **Remove the Transmission Pan**:
– After draining the fluid, remove the transmission pan completely. clean the pan and magnet inside.
2. **Access the Torque Converter**:
– Depending on the model, you may need to remove the engine cover and other components obstructing access.
– You may also need to remove the starter motor if it obstructs access to the torque converter bolts.
3. **Support the Transmission**:
– Use a transmission jack to support the transmission. If Not available, use a regular hydraulic jack with a transmission adapter.
4. **Disconnect the Driveshaft**:
– Remove the rear driveshaft. This may involve unbolting the universal joint and sliding it out of the transmission.
5. **Remove Bell Housing Bolts**:
– Locate and remove the bolts securing the torque converter to the flex plate. These bolts are typically located behind the engine and may require rotating the engine to access all of them.
6. **Disconnect Transmission**:
– Remove the transmission mount bolts and any electrical connectors or linkages Attached to the transmission.
– Carefully lower the transmission slightly to access the torque converter.
7. **Remove the Torque Converter**:
– Once everything is disconnected, pull the torque converter straight out from the transmission. Be careful, as there may be some fluid remaining.
### Installation Steps:
1. **Install the New Torque Converter**:
– Align the new torque converter with the input shaft of the transmission. Push it in until it fully engages and seats correctly. Ensure the converter is securely positioned.
2. **Reattach the Transmission**:
– Lift the transmission back into place using the jack. Ensure that it aligns properly with the engine and the mounting points.
– Reinstall the transmission mount bolts and torque them to the manufacturer’s specifications.
3. **Reconnect the Driveshaft**:
– Reinstall the driveshaft, ensuring all bolts are tightened properly.
4. **Reconnect Bell Housing Bolts**:
– Reinstall the torque converter bolts to the flex plate, ensuring they are tightened to the specified torque.
5. **Reinstall Transmission Pan**:
– place a new gasket on the transmission pan
and reinstall it. Torque the bolts to the specified values.
6. **Refill Transmission Fluid**:
– Use a funnel to refill the transmission with new ATF through the dipstick tube. Follow the manufacturer’s specifications for the amount and type of fluid.
7. **Reconnect the Battery**:
– Reattach the negative battery terminal.
8. **Start the Vehicle**:
– Start the engine and let it idle for a few minutes. Check for any leaks under the vehicle.
9. **Check Transmission Fluid Level**:
– With the engine running, check the transmission fluid level using the dipstick. Add fluid as necessary to reach the proper level.
### Final Checks:
– Take the vehicle for a short test drive to ensure the transmission functions correctly and the torque converter operates smoothly.
– Monitor for any unusual noises or leaks.
### Important Notes:
– Ensure all bolts are torqued to the specifications provided in the service manual.
– It is advisable to have a service manual on hand for specific torque values and procedures.
– If you are Not confident in performing this task, consider hiring a professional mechanic.
**Disclaimer**: This guide provides a general overview and should be adapted based on specific model variations and personal experience. Always prioritize safety and consult a professional if needed.
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