A Guide to Suspension Control Arm Bushings for the 2003-2009 Mercedes-Benz E320
Experiencing clunks, squeaks, or sloppy steering? Your E320's control arm bushings may be the cause.
- Clunking over bumps is the most common symptom of a bad control arm bushing on the E320.
- For a lasting repair, choose OEM-equivalent brands like Corteco or Febi; avoid budget brands like URO Parts for this critical component.
- Replacing the entire control arm is often easier and smarter than pressing out just the old bushing.
- A wheel alignment is mandatory after the repair to prevent unsafe handling and premature tire wear.
Is Your E320 Making Suspension Noises?
One of the most common complaints from W211 E-Class owners is suspension noise, especially from the front end. A clunking, creaking, or squeaking sound when driving over bumps at low speeds is a classic sign of a failed control arm bushing. 🎬 Watch: Hear what a noisy E320 suspension sounds like. These parts are considered a normal wear-and-tear item, but due to the weight and complexity of the E320's suspension, they can wear out sooner than you might expect. The forward lower control arm bushing is particularly known to fail, sometimes in as little as 40,000-50,000 miles.
Known Issues and Service Bulletins
Mercedes-Benz has issued Technical Service Bulletins (TSBs) related to front suspension noises on this platform. TSB #LI46-40-P-047549 notes "cracking/creaking noises from front axle" on 2003 models. TSB #322232 mentions a "knocking/rumbling noise from front left of vehicle" for the 2004 model year. These bulletins indicate that front suspension bushing and arm issues are a recognized problem. 🎬 See this guide to diagnosing W211 suspension issues. No safety recalls have been issued by the NHTSA for this specific component.
Choosing the Right Aftermarket Bushing
When shopping for new aftermarket bushings, quality matters significantly for your Mercedes-Benz. Suspension parts from unknown or budget brands can fail quickly, sometimes in less than a year, forcing you to do the job all over again. It's better to choose a reputable brand to maintain the ride quality and safety you expect. Aftermarket brands can be grouped into tiers based on quality and reputation among mechanics and owners.
Brand Quality Tiers for Your E320
- Tier 1: OEM-Equivalent Brands (Recommended): Brands like Corteco and Febi (often part of the Bilstein Group) are known to be Original Equipment Manufacturers (OEM) or suppliers for Mercedes-Benz. Choosing these brands is the closest you can get to buying a genuine part from the dealer without the high price tag. Lemförder is another top-tier OEM supplier frequently recommended by specialists.
- Tier 2: Reputable Aftermarket Brands: Brands like Moog and Delphi have a long-standing reputation in the aftermarket. They are generally considered reliable and a good balance between cost and quality. Some users have had positive experiences with Mevotech's higher-end lines (Supreme or TTX), but their budget lines have received mixed reviews.
- Tier 3: Budget Brands (Use with Caution): Brands like URO Parts, Suspensia, and other unbranded parts are the most affordable. However, forum discussions frequently report very poor quality and premature failure with URO Parts on German vehicles. While the low price is tempting, these parts are not recommended for critical suspension components on an E320, as failure can affect safety and will likely cost more in the long run.
Pro Tip: Replace the Whole Arm, Not Just the Bushing
Replacing just the bushing is labor-intensive and requires a special hydraulic press to push the old one out and the new one in. Many experienced mechanics and DIYers choose to replace the entire control arm assembly instead. These assemblies come with new bushings and a new ball joint already installed, which saves a significant amount of time and eliminates the need for a press. While the part cost is higher, the labor can be easier and cheaper, and you get the benefit of a new ball joint at the same time.
🎬 Watch: Step-by-step guide to replacing the lower control arm.Cost to Replace E320 Control Arm Bushings
The cost can vary widely based on your location, the shop, and which parts you choose to replace. An alignment is necessary after the repair.
| Item | Estimated Cost |
|---|---|
| Aftermarket Bushing (Part Only) | $8 - $64 per bushing |
| Shop Labor (Bushing Only) | $150 - $350 per side |
| Aftermarket Control Arm Assembly (Part Only) | $70 - $250+ per arm |
| Total Professional Job (Bushings) | $470 - $640 |
Frequently Asked Questions
How many control arm bushings does my E320 have?
The front suspension on a W211 E320 has an upper control arm and two lower control arms on each side (a forward thrust arm and a rearward spring control arm). Each arm has bushings. The most common to fail are the large, often fluid-filled bushings on the forward lower control arms (thrust arms). Several bushings may be used per car.
Can I drive with a bad control arm bushing?
You can for short distances, but it is not recommended. A failed bushing puts extra stress on other suspension components, can cause unpredictable steering, and may lead to unsafe handling, especially at high speeds or during braking. It's best to get it inspected and repaired soon.
Is replacing a control arm bushing a DIY job?
Replacing only the bushing is very difficult for a DIY mechanic because it requires a hydraulic press. However, replacing the entire control arm assembly is much more feasible for someone with mechanical experience and the right tools, like a ball joint separator and torque wrench.
Will I need a wheel alignment after replacement?
Yes. Any time you replace major suspension components like control arms or bushings, you must have a professional wheel alignment performed. Skipping this step will cause poor handling and rapid, uneven tire wear.
Helpful Videos
Technical Specifications
OEM Part Numbers: 2113332914 2113331914 2113334314 2303331314
The W211 platform uses a multi-link front suspension with upper and lower control arms. The forward lower control arm (thrust arm) bushing is a common, high-wear item, often utilizing a hydraulic fluid-filled design for improved damping. Replacement requires specialized tools, including a hydraulic press for the bushing or a ball joint separator for the full arm.
We Have This Part in Stock
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 E320:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your E320 Making Suspension Noises?
- Known Issues and Service Bulletins
- Choosing the Right Aftermarket Bushing
- Brand Quality Tiers for Your E320
- Pro Tip: Replace the Whole Arm, Not Just the Bushing
- Cost to Replace E320 Control Arm Bushings
- Frequently Asked Questions
- 🎟️ Get 5% Off