In this guide, you will learn how to replace swaybar bushings on a Mercedes-Benz, also known as torsion bar bushings.
The pictures and video are from a 2010 Mercedes-Benz GL550 but Mercedes-Benz uses the same setup on almost all models including the E-Class, C-Class, S-Class, CLK-Class, SL-Class, ML-Class, R-Class. The part numbers are different for each model but the repair and replacement procedure remains the same.
Common symptoms of bad swaybar bushings include:
- The suspension feels loose.
- Clunking noise from front-end suspension.
What you will need
- Park vehicle on level ground and set the parking brakes.
- Allow the engine to cool down. For your additional safety, place a wedge on both sides of the rear wheel.
- Raise the vehicle and support with jack stands. Remove front wheels.
- Remove splash shield under the car. It is held in place with multiple 8mm screws.
- Spray penetrating oil on the swaybar's bolts then wait 15 minutes.
- Hoist the opposite side of the swaybar support to make it possible to loosen the tension on the side being replaced.
- Using a small screwdriver, remove the dirt that has accumulated on the bolts to expose it.
- Loosen the bracket retaining bolts using an 18mm socket and a breaker bar.
- Remove the retaining bolts using an 18mm socket and a ratchet wrench.
- Remove the swaybar support retaining nut using a 13mm socket wrench (optional impact wrench). It is recommended to use another 13mm socket wrench into the bolt to counteract the rotation of the bolt.
- Push the swaybar support retaining bolt out.
- Remove the bushings, lower bushing first then upper bushing.
- Prepare the new bushing.
- Install the upper bushings first, you may need to slide it in place.
- Install lower bushings.
- Install swaybar support retaining bolt and nut.
- Install the bracket and fasten the retaining bolt by hand.
- Fasten bracket bolt using a ratchet wrench with an 18mm socket.
- Torque the bolts at specifications. It is recommended to torque the sway bar bushing bolts, when the vehile is lowered and wheels are on the ground. Repeat the procedure for the bushing on the other side.
- Reinstall the splash shield.
- Install wheels. Lower vehicle. Remove the jack stands and jack and torque the lug nuts.
- Sway bar bushing bolts* - 50 ft-lbs, 70 Nm
- Wheel lug nuts* - 90 ft-lbs
These are typical values and may vary between models. Call your vehcile dealer and verify.
Frequently Asked Question
How do you know if your swaybar bushing is bad?
- One of the common symptoms of swaybar bushing problems is a Clunking noise from front end suspension and a feeling of loose suspension.
Can you drive a Mercedes-Benz with a swaybar bushing is bad?
- It is not recommended to drive a car with a bad swaybar bushing for it may lead to driving instability.