A Practical Guide to the 2006-2020 Mercedes-Benz E350 Transmission Mount
Eliminate drivetrain vibrations and clunking noises by understanding and choosing the right transmission mount for your E350.
- The most common symptom of a bad mount is a vibration in the seat and center console when idling in gear.
- For best results and longevity, choose an OE-equivalent brand like Corteco or Febi.
- It is strongly recommended to replace the engine mounts at the same time as the transmission mount.
- The replacement is a simple DIY job on RWD models but more complex on 4Matic versions.
Symptoms of a Failing E350 Transmission Mount
When the rubber in the transmission mount ages, cracks, or collapses, it can no longer do its job effectively. The signs are often subtle at first but become more obvious over time. Pay close attention to these specific symptoms in your E350:
- Vibration in the Seat and Floor: The most common sign is a new vibration or a low-frequency drone felt through the seats, center console, and floorboards. This is most noticeable when the car is stopped but still in gear, like at a traffic light. The vibration often disappears or lessens when you shift into Neutral or Park.
- Clunking or Thumping Noises: A distinct "clunk" or "thump" sound when you shift from Park into Drive or Reverse is a classic symptom. You may also hear or feel this noise when you accelerate or decelerate suddenly as the transmission shifts its weight.
- Rough Shift Sensation: While the mount doesn't affect the transmission's internal mechanics, its failure allows for excess movement that can make normal gear shifts feel harsher than usual.
Pro Tip: Is It the Engine or Transmission Mount?
Symptoms can be similar, but the location of the vibration is a key clue. Vibrations from a bad transmission mount are typically felt in the seat and center console. Vibrations from bad engine mounts are more often felt through the steering wheel, especially at idle.
Choosing the Right Aftermarket Transmission Mount
For a Mercedes-Benz, the quality of the rubber used in a mount is critical for vibration absorption. While saving money is tempting, a low-quality mount can fail to restore the car's smooth feel. Brands are generally available in three tiers.
Tier 1: OE-Equivalent Brands
These brands are often the original equipment manufacturers for Mercedes-Benz. They provide the best performance and longevity, nearly identical to the part you'd get from a dealer, but without the dealership price tag.
- Corteco: Widely confirmed by owners to be an OEM supplier for Mercedes-Benz mounts. Choosing Corteco is a reliable way to restore original ride quality.
- Febi: Another top-tier German brand known for producing OEM-quality parts. Febi and Corteco are both excellent choices for this repair.
- CRP (Rein): A reputable brand that offers high-quality aftermarket parts for European vehicles.
Tier 2: Quality Aftermarket
These brands offer a good balance of price and quality, though they may not have the same OEM pedigree.
- URO Parts: URO Parts can be a cost-effective alternative. However, some users have reported mixed results with the longevity of their rubber components on other mounts for this platform, so it may be a compromise.
Tier 3: Budget Brands
These are the most affordable options but may not provide the same level of vibration damping or last as long as OE-equivalent parts.
- Anchor: A common budget-friendly brand.
- DEA: Another economy option for those prioritizing low initial cost.
A Note on 4Matic vs. RWD
Rear-wheel drive (RWD) and 4Matic (AWD) versions of the E350 often use different transmission mounts. The 4Matic mount is typically a more substantial part. Always verify the part fitment for your specific vehicle using your VIN before ordering.
Cost to Replace a Mercedes-Benz E350 Transmission Mount
The cost for this repair is very reasonable, especially for RWD models. The part itself is not expensive, and the labor is straightforward.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $30 - $134 |
| New OEM Part | $110 - $150 |
| Shop Labor | $94 - $250 |
| Total Estimated Cost (Indy Shop) | $204 - $384 |
Frequently Asked Questions
Should I replace my engine mounts at the same time?
It is highly recommended. 🎬 Watch: Complete walkthrough for replacing both engine and transmission mounts. Engine and transmission mounts wear out at a similar rate. If the transmission mount has failed, the engine mounts are likely worn as well. Replacing all of them at once restores the entire drivetrain's stability, ensures a lasting repair, and can save on labor costs in the long run.
Is this a difficult DIY job?
For a rear-wheel drive E350, this is considered a very easy DIY project that can be done in under an hour. 🎬 See how easy it is to swap the mount yourself. It involves safely raising the vehicle, supporting the transmission with a jack, and replacing a few bolts. The job is more involved on 4Matic models.
🎬 Watch: Step-by-step 4Matic transmission mount replacement guide.Will a bad transmission mount cause further damage?
Yes. While you can drive the car, it's not recommended for long periods. A failed mount puts significant extra stress on the engine mounts, driveshaft flex discs (giubos), exhaust hangers, and other drivetrain components, which can lead to more expensive repairs.
Are there any recalls for the E350 transmission mount?
No, as of early 2026, there are no specific NHTSA recalls or Technical Service Bulletins (TSBs) for premature failure of the transmission mount on the 2006-2020 E350. It is considered a standard wear-and-tear maintenance item.
Helpful Videos
Technical Specifications
OEM Part Numbers: 2122400418 2042400618 2122400618 2032400218
The transmission mount is a single assembly consisting of a metal frame and a bonded rubber core. Part numbers differ between Rear-Wheel Drive and 4Matic models. The rubber core is designed to absorb vibration and will physically collapse or sag when it fails.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mercedes-Benz E350:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing E350 Transmission Mount
- Pro Tip: Is It the Engine or Transmission Mount?
- Choosing the Right Aftermarket Transmission Mount
- Tier 1: OE-Equivalent Brands
- Tier 2: Quality Aftermarket
- Tier 3: Budget Brands
- A Note on 4Matic vs. RWD
- Cost to Replace a Mercedes-Benz E350 Transmission Mount
- Frequently Asked Questions
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