Suspension & Steering Parts for 2014 Mercedes-Benz E250 Bluetec Diesel

The 2014 Mercedes-Benz E250 Bluetec Diesel is a refined luxury sedan that combines efficiency with comfort. However, its added weight from the diesel engine and emissions hardware puts extra stress on the suspension and steering components. Over time, bushings wear, shocks lose their damping, and steering parts develop play. Whether you're replacing worn parts or upgrading for better handling, understanding what fits and what to expect helps you make an informed choice.

Suspension Components for the 2014 E250 Bluetec

The E250 Bluetec uses a multi-link front and rear suspension design shared with other W212 models, but with specific spring rates and damping tuned for the diesel's weight distribution. Key parts that commonly need replacement after 80,000–120,000 miles include:

Shocks and Struts

Front struts and rear shocks on the E250 Bluetec are hydraulic and may be either standard or Airmatic (air suspension) depending on the option code. Non-airmatic models use conventional struts. Worn shocks cause excessive bouncing, nose dive during braking, and vague handling. OEM replacements from Sachs or Bilstein are direct fits. Aftermarket options like Bilstein B4 provide OE-level comfort, while B6 or B8 offer firmer damping if you want sportier response. When replacing, always install new bump stops and bellows.

Control Arms and Bushings

The front lower control arms (both forward and rearward) and rear multi-link arms are common wear points. The rubber bushings crack and separate, leading to clunking noises, uneven tire wear, and wandering steering. Complete control arms with pre-installed ball joints and bushings save labor. OEM arms are supplied by Lemförder or TRW. Aftermarket brands like Meyle and Febi Bilstein offer quality alternatives at lower prices. Avoid no-name budget arms—they often fail prematurely.

Sway Bars and Links

The stabilizer bar (sway bar) links are another frequent replacement item. These small rods with ball joints become loose and produce a rattling sound over bumps. Replace them in pairs. Moog and Lemförder offer greaseable versions that last longer. The sway bar bushings themselves can also wear, but less often.

Springs

Coil springs on the E250 Bluetec are heavy-duty to support the diesel engine. They rarely fail, but can sag over time, lowering ride height and causing poor handling. If you replace shocks, consider new springs if the car has high mileage. OEM springs are color-coded; matching the paint marks ensures correct ride height. Aftermarket springs from H&R or Eibach lower the car for a sportier look, but check that they maintain proper clearance.

Steering System Parts

The E250 Bluetec uses an electric power steering (EPS) system, which eliminates the hydraulic pump and lines. Steering inputs are precise, but wear in mechanical linkages can still occur.

Steering Rack and Pinion

The steering rack is generally reliable. However, internal wear can cause “clunking” at center or intermittent loss of assist. Replacement is expensive; often a remanufactured rack is the most cost-effective option. Ensure the replacement is programmed or calibrated for the EPS system—improper installation can trigger warning lights.

Tie Rod Ends

Inner and outer tie rod ends are the most common steering wear items. Loose tie rods cause a steering wheel that’s off-center, free play, and vibration. Outer ends are easier to replace; inners require rack removal on some models. Replace both sides and get a professional alignment afterward. Quality brands like Lemförder and Moog are recommended.

Steering Damper

The E250 Bluetec may have a steering damper (located on the rack) to reduce kickback. It seldom needs replacement unless there is excessive vibration through the wheel. If you notice steering wheel shake after hitting potholes, suspect the damper.

OEM vs. Aftermarket: What You Should Know

Benefits of OEM Parts

Original equipment parts from Mercedes-Benz guarantee fit, materials, and performance matching the factory specification. They are made by suppliers like Sachs, Bilstein, Lemförder, and TRW, but sold in Mercedes packaging at a premium. OEM parts are ideal if you want to restore the exact ride quality and have the budget.

When Aftermarket Makes Sense

Aftermarket parts from reputable brands offer similar or improved durability at a lower price. For example, Bilstein B6 shocks are stiffer than OEM and last longer. Control arms from Meyle often come with upgraded bushings. The key is to avoid cheap, unbranded parts. Stick to well-known brands and verify compatibility with the diesel model (some parts differ between gasoline and diesel). Also note that some aftermarket parts may not include hardware like bolts, which should be replaced with new OEM fasteners.

Signs Your Suspension or Steering Needs Attention

Watch for these symptoms:

• Clunking or knocking when driving over bumps (worn control arms, sway bar links, or ball joints)
• Excessive body roll or nose dive (worn shocks/struts)
• Steering wheel vibration or wandering (tie rod ends, wheel balance, or alignment)
• Uneven tire wear (control arm bushings or alignment issues)
• Airmatic system warning lights (leaking air springs or compressor)

If you experience any of these, inspect the parts promptly. Driving with worn suspension reduces safety and can damage other components like tires and wheel bearings.

How to Choose the Right Parts for Your E250 Bluetec

First, confirm your vehicle’s build options: VIN lookup will tell if you have Airmatic (code 489) or standard suspension, and whether the steering is electric or hydraulic. For non-Airmatic cars, a complete strut assembly (pre-assembled with spring and mount) is a time-saver. For air suspension, only use OEM or high-quality aftermarket air springs; cheap replacements often leak.

When ordering, check part numbers against your VIN. Many online retailers allow VIN filtering. Buy from automotive specialty stores or directly from distributor sites. Avoid marketplaces due to inconsistent quality.

Final Recommendation

For the 2014 Mercedes-Benz E250 Bluetec Diesel, stick with OEM-quality parts from brands like Bilstein (for shocks/struts), Lemförder or Moog (for steering and suspension joints), and Meyle (for control arms). If you plan to keep the car long-term, replace shocks and struts in pairs and align afterward. For steering components, replace inner and outer tie rods together. Always use new bolts and nuts for critical fasteners. A well-maintained suspension and steering system will preserve the E250’s ride comfort and handling, making your daily drive safe and enjoyable.