Mercedes Benz's sway bar bushing or torsion bar bushing rarely breaks; however, the rubber in these bushings would wear out over time.
The easiest way to replace the sway bar bushings is by following our step-by-step guide below.
- One of the symptoms of a faulty sway bar bushing is a feeling of loose suspension when traversing a rough or uneven road.
- Clunking noise when going over bumps from one or both sides of a vehicle's front carriage can also be a symptom of faulty sway bar bushings,
- Park the vehicle on safe and level ground.
- Set the parking brake and use wheel chocks.
- Use a lug wrench to loosen the front wheel's lug nuts by turning the wrench counterclockwise.
- Using a jack, raise the vehicle and secure it with jack stands to support it. Remove the left, right, or both wheels from the vehicle using a lug wrench.
- Remove the engine splash cover by removing six 8mm bolts. Keep in mind that a plastic hook on the crossbeam support holds the splash cover-up.
- To find the sway bar bushings, you will look for a u-shaped solid bar that is approximately 3/4 inches in diameter. The sway bar is secured by two rubber bushings attached to the frame on the (left and right).
- Using a small screwdriver, remove the dirt that has accumulated on the bolts to expose them.
- Spray penetrating oil on the swaybar's retaining bolts, then wait for fifteen minutes.
- Loosen the two bracket retaining bolts using an 18mm socket and a breaker bar. Turn the breaker bar counterclockwise until the bolt turns freely.
- Now remove the retaining bolts using an 18mm socket and a ratchet. Set the ratchet to loosen counterclockwise until it detaches from the retaining nut.
- Remove the bushing retaining nut using a 13mm deep socket. Another 13mm wrench will need to hold the bolt from rotating. Turn the ratchet counterclockwise while keeping the other side in place with a 13mm tool.
- Detach the nut from the bolt, then push the bushing retaining bolt out.
- Remove the old upper and lower bushings.
- Prepare the new bushing.
- You may pry the torsion bar down a bit to make some room for upper bushing installation, then install the new upper bushings first. You may need to slide it in place.
- Install the new lower bushings.
- Install the retaining bolt and the nut by hand. Use your 13mm socket with ratchet, set clockwise to tighten. Turn the nut clockwise while using another 13 mm wrench to hold the bolt from spinning.
- Install the bracket bolt by hand, then fasten it with a ratchet and an 18mm socket.
- Torque the bolts to specifications.
- Reinstall the engine splash shield by fastening six 8mm bolts. Use a ratchet and a socket.
- Reinstall the wheels, fasten the lug nuts by turning them clockwise with a lug wrench; then raise the jack and remove the jack stands and lower the vehicle to the ground.
- Tighten the lug nuts again and torque to specifications.
- Bolt, torsion bar to front axle carrier: 30Nm (Typical)
Verify the torque specs by calling your dealer and provide them with your VIN.
Frequently Asked Questions
What is the purpose of the sway bar?
- A sway bar or torsion bar's job is to prevent the vehicle from leaning too much when turning.
What is the purpose of sway bar bushings?
- Sway bar bushings isolate the sway bar from the body or frame to reduce noise.
Is it necessary to lubricate the swaybar bushing during the installation?
- It is not necessary to lubricate the swaybar bushings.
What causes sway bar bushings to go bad?
- The bushings rarely break, but they do wear out over time. They can also be damaged if they get soaked by engine oil or another fluid leak.