Genuine Mercedes-Benz Upper Control Arms & OEM Spares

The upper control arm plays a pivotal role in the multi-link suspension architecture Mercedes-Benz is known for, maintaining the camber and caster angles of your wheels. While the lower arms support the vehicle's weight, the upper arms stabilise the top of the steering knuckle, keeping the tyres in maximum contact with the road during cornering and at speed. Whether you drive an S-Class or a GLE, the integrity of the ball joints and bushings determines that planted feel.

The Wear Sequence

Heat and road stress crack the rubber bushings and let the integrated ball joints develop play. The progression is consistent: a rattle over minor road imperfections first, then a disconnected steering feel on centre, then accelerated and uneven tyre wear that gets misdiagnosed as an alignment fault.

What to Know Before Ordering

Replace the arm, not the bushing. Mercedes supplies most arms complete with the bushing and ball joint pressed in — that is the intended and durable repair.
Upper arms set camber directly, so a four-wheel alignment is mandatory afterwards. Skipping it produces exactly the tyre wear the repair was meant to cure.
Left and right, front and rear are frequently distinct part numbers.
Calendar age matters as much as mileage — bushings degrade with heat and time, which is why low-mileage cars in Gulf conditions still need inspection.

We supply genuine Mercedes-Benz upper control arms and premium OEM replacements from Lemförder, TRW and Bilstein, meeting the metallurgical and acoustic standards of the factory. Authentic hardware also ensures ESP and the electronic steering systems continue to operate with their designed precision.

Related Categories

Full Mercedes-Benz catalogue → · Upper & lower control arms → · All upper control arms → · Shocks & springs → · Wheel hubs & bearings → · Axle & steering → · Lemförder →

Frequently Asked Questions

The most common symptoms include a faint "clinking" or "knocking" sound when driving over small bumps, a noticeable vibration through the steering wheel, and uneven wear on the inner edge of your front tires. If the ball joint is severely worn, you may also experience "steering wander," where the vehicle requires constant small corrections to stay straight on the highway.
On most modern Mercedes-Benz models (such as the W205 C-Class or W222 S-Class), the upper ball joint is permanently integrated into the aluminum or steel control arm. Because it is a non-serviceable unit, the entire upper control arm assembly must be replaced to ensure the safety and structural integrity of the suspension.
Mercedes-Benz works closely with premier German chassis specialists. Most Genuine upper control arms are manufactured by Lemförder or TRW. When you purchase these OEM brands from Europarts360, you are getting the exact same quality and fitment as the parts sold at the dealership, often at a more competitive price point.
The "double-wishbone" suspension design is common in higher-end Mercedes-Benz models. The upper control arm often has a "V" or "A" shape with two mounting points on the chassis. This design allows for much better control over wheel movement than a standard strut setup, providing superior handling and comfort.
Yes. Since the upper control arm directly influences the camber (the tilt of the wheel) and caster, any replacement will slightly alter the suspension geometry. A professional alignment is necessary to protect your tires and ensure the car handles correctly.
While the control arms perform the same mechanical function, the specific part numbers can differ for vehicles equipped with AIRMATIC or Active Body Control (ABC) compared to those with standard steel springs. Always use your Vehicle Identification Number (VIN) to ensure the arm you order is compatible with your suspension type.
Upper control arms are safety-critical components. Cheap aftermarket versions often use lower-quality rubber that dry-rots in half the time, and inferior ball joints that can fail prematurely. Furthermore, non-OEM arms may not have the same acoustic dampening, which can lead to increased road noise inside the cabin.
Yes. Suspension components are subjected to the same mileage and road conditions. If the ball joint on the left side has failed, the right side is typically close behind. Replacing them in pairs ensures balanced handling and prevents the need for a second alignment in the near future.
Under ideal conditions, they can last between 70,000 and 100,000 miles. However, in regions with heavy potholes or extreme temperature fluctuations, the rubber bushings may begin to crack as early as 50,000 miles.
- Genuine Parts: These are the exact components installed at the factory, arriving in the original vehicle manufacturer’s branded packaging (e.g., Porsche or BMW).
- OEM Parts: These are produced by the same manufacturers that supply the car brands (e.g., Bosch, Brembo, Lemförder) but are sold in the supplier’s own packaging, often at a more competitive price.
- Aftermarket Parts: These are third-party components designed to meet or exceed original specifications.

Mercedes Benz Upper Control Arm

Genuine Mercedes-Benz Upper Control Arms & OEM Spares

The Wear Sequence

What to Know Before Ordering

Related Categories

Frequently Asked Questions