How can I fix the transmission shudder in my Mercedes-Benz E-Class W213 (2016-2024)?

Fixing Transmission Shudder in Mercedes-Benz E-Class W213 (2016-2024)

Symptoms of Transmission Shudder:

• Noticeable vibration or shaking during acceleration or deceleration.
• Shuddering when shifting gears, particularly from 1st to 2nd or 2nd to 3rd.
• Increased RPMs without corresponding acceleration (slipping).
• A burning smell or unusual noises from the transmission.

Diagnostic Steps

1. Visual Inspection:

   • Check the transmission fluid level and condition.
   • Look for any leaks under the vehicle.
   • Inspect the transmission mounts for wear or damage.

2. Check for Fault Codes:

   • Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the transmission.
   • Note any codes that may indicate issues with the transmission control module (TCM) or solenoids.

3. Test Drive:

   • Take the vehicle for a test drive to replicate the shuddering. Pay attention to when the shudder occurs (e.g., specific speeds, RPM ranges, or conditions).

4. Transmission Fluid Quality:

   • If the fluid appears dark, burnt, or contaminated, it may need to be changed.

5. Software Updates:

   • Check with a Mercedes-Benz dealer or authorized service center for any software updates for the transmission control unit.

Tools Required

• OBD-II scanner
• Transmission fluid dipstick or funnel
• Socket and ratchet set
• Torque wrench
• Drain pan
• New transmission fluid (check specifications in the owner's manual)
• Transmission filter (if applicable)
• Safety gloves and goggles

Repair Instructions

Step 1: Check Transmission Fluid

1. Locate the Transmission Dipstick:

   • Open the hood and locate the transmission dipstick. It's usually labeled and can be found near the back of the engine.

2. Check Fluid Level:

   • Remove the dipstick, wipe it clean, and reinsert it fully.
   • Remove the dipstick again and check the fluid level. It should be within the marked range.

3. Check Fluid Condition:

   • Inspect the fluid for color and smell. Fresh transmission fluid is usually red or pink; burnt fluid is brown or black.

Step 2: Replace Transmission Fluid (if necessary)

1. Prepare the Vehicle:

   • Raise the vehicle using a jack and secure it with jack stands.

2. Drain the Old Fluid:

   • Locate the transmission drain plug (if equipped). Position a drain pan underneath and remove the plug to drain the fluid completely.

3. Replace the Filter (if applicable):

   • Remove the transmission pan if the filter is inside it. Replace the old filter with a new one.

4. Reinstall the Drain Plug:

   • Tighten the drain plug to the manufacturer’s specified torque.

5. Refill Transmission Fluid:

   • Use the dipstick tube to add new transmission fluid. Start with the amount indicated in the owner's manual and check the level with the dipstick.

Step 3: Check for Software Updates

1. Visit a Dealer:
   • If you suspect a software issue, take the vehicle to an authorized Mercedes-Benz dealer.
   • Ask them to check for updates or reprogram the TCM if necessary.

Step 4: Inspect Transmission Components

1. Check Mounts and Linkages:

   • Inspect the transmission mounts for wear. If cracked or broken, replace the mounts.
   • Ensure that linkages are properly adjusted and not binding.

2. Inspect Torque Converter:

   • If the problem persists, the torque converter may be failing. This usually requires a more in-depth inspection or replacement.

Conclusion

If the above steps do not resolve the transmission shudder, it may be indicative of a more serious internal transmission issue. In that case, it is advisable to consult a professional technician or a Mercedes-Benz service center for further diagnosis and repair.