Mercedes-Benz Parts Catalog Mercedes-Benz Accessories Catalog Mercedes-Benz Technical Articles Mercedes-Benz Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
Bookmark and Share

Pelican Technical Article:

Rear Sway Bar Links Replacement

Kerry Jonsson

Time:

2 hours2 hrs

Tab:

$200

Talent:

**

Tools:

13mm, 17mm, 19mm wrenches and/or sockets with ratchet

Applicable Models:

Mercedes-Benz R129 (1990-02)

Parts Required:

Rear sway bar link

Hot Tip:

Spray fasteners with penetrating oil

Performance Gain:

Eliminate clicking noise from rear suspension when changing direction

Complementary Modification:

Replace sway bar bushings at the same time

When a car goes into a turn the wheels and tires turn in that direction. Due to inertia the body of the car wants to continue to go straight. This causes and outside weight transfer causing the outside suspension to compress and the inside suspension to expand slightly. This is known as body roll. Now typically drivers do not like excessive body roll particularly in sports cars. You can say it makes you feel like you're riding a boat and "floating" around a corner. The job of the sway bar is to connect the outside suspension parts that are compressing in a corner and transfer some of that energy into compressing the inside suspension. With both outside and inside suspension components compressing there is less body roll and the driver feels like "the car is riding on rails" as it arcs through a corner. The sway bar is often a complicated metal bar. It has to connect the left and right side suspension components and make it around sub-frames and suspension arms. Sway bar links make this possible. The sway bar link is a flexible joint that connects the lower control arm to the sway bar. Over time these links can wear out from all the suspension movement. As you go through turns you may hear a light clicking as the sway bar links change the direction from the load. In this tech article we will go over the steps to replace your sway bar links.

Lift and support rear axle of the vehicle. 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 front 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 left 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 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

ThisPicture illustrates under the rear of the car on the left side looking at the inner part of the lower control arm.
Figure 1

ThisPicture illustrates under the rear of the car on the left side looking at the inner part of the lower control arm. Remove the 10mm fastener (green arrow). You do not need to remove the roll-bar sensor to remove this fastener. You can just move the sensor arm down to give you more room to remove the fastener.

Figure 2

On the front side of the control arm remove the 10mm fastener (green arrow)

Remove the lower control arm plastic cover by pulling straight off the control arm.
Figure 3

Remove the lower control arm plastic cover by pulling straight off the control arm. You do not need to remove the brake caliper and rotor to perform this procedure. We have remove the rear brake caliper and rotor for photographic purposes.

ThisPicture illustrates looking at the back of the rear lower control arm.
Figure 4

ThisPicture illustrates looking at the back of the rear lower control arm. Remove the 13mm nut (green arrow) while holding a wrench on the other side of the fastener.

Slide the bolt out of the lower control arm.
Figure 5

Slide the bolt out of the lower control arm. You can tap it out with a hammer but be careful not to damage the threads.

ThisPicture illustrates the sway bar link to sway bar mount.
Figure 6

ThisPicture illustrates the sway bar link to sway bar mount. Remove the 19mm nut (green arrow) from the bolt fastener (yellow arrow), also 19mm.

Use the open end side of the wrench on this fastener to hold it still while you loosen the other side.
Figure 7

Use the open end side of the wrench on this fastener to hold it still while you loosen the other side.

Remove the upper sway bar link mount from the sway bar.
Figure 8

Remove the upper sway bar link mount from the sway bar.

Pull the sway bar link out of its mount in the lower control arm.
Figure 9

Pull the sway bar link out of its mount in the lower control arm. Installation is the reverse of the removal procedure. Fit the lower sway bar mount into the lower control arm and install the upper mount of the sway bar link in the sway bar. Tighten the upper mount fasteners and install the lower sway bar link fasteners. You may have to flex the sway bar to get the sway bar link lower mounting holes to line up with the lower control arm mounting holes. Install and tighten the fasteners.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Wed 12/7/2016 02:29:03 AM