Replacing the gearbox (transmission) on a Mercedes-Benz CE320 C124 is a complex task that requires mechanical knowledge, special tools, and safety precautions. click here for more details on the download manual…..

Mercedes Benz e320 coupe

Below, I will outline the detailed steps and components involved in this process. Note that this is a general guide and may not cover every specific detail for your model. Always refer to the official service manual for your vehicle for precise instructions and specifications.

### components and tools Needed

#### Components:
1. **Replacement Gearbox (Transmission)**: Ensure it’s compatible with your CE320.
2. **Transmission Mounts**: These may need replacement if worn.
3. **Transmission Fluid**: OEM recommended fluid for refilling.
4. **Gaskets and Seals**: For the transmission pan and other connections.
5. **Transmission Filter Kit**: If applicable, to replace the filter in the transmission.

#### Tools:
1. **Jack and Jack Stands**: For lifting the car safely.
2. **Torque Wrench**: To ensure all bolts are tightened to the proper specifications.
3. **Socket Set**: Various sizes, including extensions.
4. **Pliers and Wrenches**: For additional fastening and removal tasks.
5. **Transmission Jack**: specifically designed to support the transmission during removal and installation.
6. **Fluid Catch Pan**: To catch any fluid that may leak during the process.
7. **Shop Manual**: For torque specifications and detailed diagrams.

### Replacement Process

1. **Preparation**:
– **Safety First**: Park the vehicle on a level surface, engage the parking brake, and disconnect the negative battery terminal to prevent electrical shorts.
– **Lift the Vehicle**: Use a jack to lift the front of the vehicle and secure it with jack stands.

2. **Drain the Transmission Fluid**:
– Place the fluid catch pan under the transmission pan.
– Remove the transmission pan bolts and carefully lower the pan to drain the old fluid. You may need to gently tap it to break the seal.

3. **Remove the Drive Shaft**:
– Identify the drive shaft and mark its position to ensure proper alignment during reinstallation.
– Unbolt the drive shaft from the rear differential and the transmission. Carefully slide it out.

4. **Disconnect Linkages and Wiring**:
– Remove the shift linkage connected to the transmission.
– Disconnect any electrical connectors attached to the transmission, including the transmission control module (if applicable).

5. **Support the Transmission**:
– Position the transmission jack underneath the gearbox to support it safely.

6. **Remove the Transmission Mounts**:
– Locate the transmission mounts and unbolt them. You may need to support the engine with a jack to relieve pressure on the mounts.

7. **Unbolt the Transmission**:
– Remove the bolts securing the transmission to the engine. These are often located on the bell housing.
– Be cautious of any remaining connections that may impede removal.

8. **Lower the Transmission**:
– With everything disconnected, carefully lower the transmission using the transmission jack. Ensure it clears the engine and other components.

9. **Install the New Transmission**:
– Carefully position the new transmission onto the jack and raise it into place.
– Align the transmission with the engine and secure it with the bell housing bolts. Ensure all connections are lined up correctly.

10. **Reattach the Transmission Mounts**:
– Bolt the new transmission mounts back into place. Make sure they are tightened to the manufacturer’s specifications.

11. **Reconnect the Drive Shaft**:
– Slide the drive shaft back into place, aligning it with the marks you made earlier. Secure it with the bolts.

12. **Reconnect Linkages and Wiring**:
– Reattach the shift linkage and any electrical connectors that were disconnected earlier.

13. **Refill Transmission Fluid**:
– Replace the transmission pan with a new gasket if necessary, and bolt it back into place.
– Use a funnel to refill the transmission with the appropriate fluid through the dipstick tube (if equipped). Check the owner’s manual for the correct amount and type.

14. **Reconnect the Battery**:
– Reconnect the negative battery terminal.

15. **Test Drive**:
– Start the vehicle and allow it to warm up. Check for any leaks around the transmission and ensure that it shifts properly. Take the vehicle for a short test drive to verify operation.

### Final Checks
– After the test drive, recheck the transmission fluid level and adjust if necessary.
– Inspect for any leaks or irregular sounds.

### Important Notes
– Always refer to the vehicle’s service manual for specific torque specifications and procedures.
– Consider consulting a professional mechanic if you are unsure about any steps in the process.
– Safety should always be your top priority; ensure proper lifting techniques and safety gear are used throughout the job.

This guide provides a comprehensive overview of the gearbox replacement process for a Mercedes-Benz CE320 C124. Ensure you approach the task with caution and thoroughness for the best results.
The Mass Air Flow (MAF) sensor is a critical component in modern internal combustion engines, playing a vital role in the engine management system. Its primary function is to measure the amount of air entering the engine’s intake manifold. This measurement is crucial because the engine control unit (ECU) uses it to calculate the correct air-fuel mixture required for optimal combustion. The MAF sensor ensures that the engine runs efficiently, reduces emissions, and maintains performance.

Typically located between the air filter and the throttle body, the MAF sensor can be of two main types: hot wire and vane. The hot wire MAF sensor operates by using a thin wire heated to a specific temperature; as air flows over it, the cooling effect of the incoming air causes a change in the wire’s temperature. This change is proportional to the mass of air flowing past, allowing the sensor to relay accurate data to the ECU. The vane type MAF sensor uses a mechanical flap that moves in response to airflow, providing a direct measurement of air volume.

A malfunctioning MAF sensor can lead to various engine issues, such as poor fuel economy, rough idling, and increased emissions. Symptoms of a failing MAF sensor may include hesitation during acceleration, engine stalling, or the illumination of the check engine light. Regular maintenance and timely replacement of a faulty MAF sensor can help ensure an engine operates at peak performance and efficiency.