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Rear Sway Bar Link Replacement
 
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Pelican Technical Article:

Rear Sway Bar Link Replacement

Kerry Jonsson

Time:

2 hours2 hrs

Tab:

$200

Talent:

**

Tools:

16mm wrenches (2) and or sockets with ratchet

Applicable Models:

Mercedes-Benz W211 (2003-09)

Parts Required:

Rear sway bar links

Hot Tip:

Spray the fasteners with penetrating oil to help loosen them

Performance Gain:

Eliminate clicking noise from rear while changing direction

Complementary Modification:

Change sway bar bushings at the same time

As you drive your car into a turn the wheels and suspension follow your steering input. Because of inertia, the body of your car wants to go straight. This causes the suspension in the outside of the turn to compress and the suspension on the inside of the turn to expand slightly. This is known as body roll and most drivers do not like the feeling. With excessive body roll the driver feels as if they are "floating" through a turn and cannot feel the road. The job of the sway bar is to reduce body roll. The sway bar connects one side of the suspension to the other side. As the suspension on the outside of the turn compresses the sway bar twists, therefore acting on the inside suspension to compress as well. This helps reduce body roll and increases road feel for the driver. Since a sway bar must connect one side of the suspension to the other it has to have bends in it to make it around the rear sub-frame and suspension components. Sway bar links are flexible joints at the end of the sway bar to connect the lower control arm to the sway bar. Over time these sway bar bushings can wear out causing a clicking noise as the car changes direction and goes over small bumps. In this tech article we will go over all the steps to replace your sway bar bushings.

Lift and support the rear axle of the vehicle, after putting on your safety glasses. You have to remove the tires to perform this job and it does make access much easier since you may not have access to an automotive lift. See our tech article on jacking and supporting your vehicle and removing the rear tires.

The procedure to replace the rear sway bar links is the same for both the left and right side. In these pictures we are working on the right side. Keep in mind all the steps apply to both sides. It is recommended you replace both sides at the same time to keep your handling neutral.

Remember your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches

This picture illustrates the right rear wheel well.
Figure 1

This picture illustrates the right rear wheel well. Locate the sway bar link (green arrow). You do not need to remove the brake caliper and rotor to do this job. We have removed these components so you can see what weÂ're doing.

Remove the 16mm fasteners that mount the bottom sway bar link to the spindle.
Figure 2

Remove the 16mm fasteners that mount the bottom sway bar link to the spindle.

Then remove the fastener from the link.
Figure 3

Then remove the fastener from the link.

Remove the 16mm fasteners that mount the top sway bar link to the sway bar.
Figure 4

Remove the 16mm fasteners that mount the top sway bar link to the sway bar.

Pull the top mount of the sway bar link out of the sway bar mounting hole and remove it from the car.
Figure 5

Pull the top mount of the sway bar link out of the sway bar mounting hole and remove it from the car. Installation is the reverse of the removal procedure. Install the top mount of the sway bar link into the sway bar and tighten the fastener. Install the bottom sway bar link fasteners and tighten. You may have to flex the sway bar downward to line up the sway bar link and spindle mounting holes to install the fastener.

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