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Pelican Technical Article:

Rear Coil Spring Replacement

Kerry Jonsson

Time:

4 hours4 hrs

Tab:

$400

Talent:

***

Tools:

T12 twelve point socket, T55 Torx socket, E40 external Torx socket, 16mm wrench and socket with ratchet.

Applicable Models:

Mercedes-Benz W211 (2003-09)

Parts Required:

Rear coil spring

Hot Tip:

Spray fasteners with penetrating oil to help make them easier to remove

Performance Gain:

Restore proper ride height and ride

Complementary Modification:

Install performance lower springs at all four corners

Lift and support the rear axle of the vehicle while wearing 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 coil springs are 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 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 under the car by the right side lower control arm mount to the sub frame.
Figure 1

This picture illustrates under the car by the right side lower control arm mount to the sub frame. Remove the E60 external Torx fastener (green arrow). If you want you can try to remove the 18mm fastener (red arrow) but there is no room to put a wrench behind it and the washer that holds it will probably bend out of the way.

Use a T55 Torx socket to remove the toe adjustment fastener.
Figure 2

Use a T55 Torx socket to remove the toe adjustment fastener.

Pull the arm down away from the car.
Figure 3

Pull the arm down away from the car. Be careful not to lose or damage the toe adjustment shim of the rear rearward lower link sub frame mounting bracket (green arrow).

This picture illustrates looking up under the right rear lower control arm.
Figure 4

This picture illustrates looking up under the right rear lower control arm. Remove the plastic rivets (green arrows). See next step for removing instructions.

To remove the plastic rivet pull the center pin (green arrow) into the direction of the blue arrow, then you can pull out the entire plastic rivet.
Figure 5

To remove the plastic rivet pull the center pin (green arrow) into the direction of the blue arrow, then you can pull out the entire plastic rivet.

Pull the lower control arm plastic cover off the lower control arm.
Figure 6

Pull the lower control arm plastic cover off the lower control arm. You do not need to remove the rear rearward lower link but I have done so for photographic purposes.

Remove the two fasteners (green arrows) on the lower control arm but do not pull the fasteners out yet.
Figure 7

Remove the two fasteners (green arrows) on the lower control arm but do not pull the fasteners out yet. See steps 8 and 9 for detailed instructions.

Using a 12mm triple square socket on a breaker bar and an 18mm wrench remove the inner lower control arm mount fastener but leave the bolt in the arm.
Figure 8

Using a 12mm triple square socket on a breaker bar and an 18mm wrench remove the inner lower control arm mount fastener but leave the bolt in the arm.

Using an E40 Torx socket with breaker bar and 16mm wrench, remove the lower shock absorber fastener.
Figure 9

Using an E40 Torx socket with breaker bar and 16mm wrench, remove the lower shock absorber fastener. You will not be able to pull the bolt out of the lower control arm yet.

Jack up the lower control arm to compress the spring.
Figure 10

Jack up the lower control arm to compress the spring. This will also you to take tension off of the rear shock absorber lower fastener. Remove the fastener (green arrow) from the lower control arm in the direction of the blue arrow. You may need to tap it out with a mallet. Be careful not to damage the threads.

Remove the lower control arm inner mount fastener already removed here (green arrow).
Figure 11

Remove the lower control arm inner mount fastener already removed here (green arrow).

Slowly lower the jack until you have relieved all of the tension on the rear coil spring.
Figure 12

Slowly lower the jack until you have relieved all of the tension on the rear coil spring.

Remove the rear coil spring from the lower control arm of the car.
Figure 13

Remove the rear coil spring from the lower control arm of the car.

Something to note on reassembly, make sure the lower end of the rear coil spring is seated up against its perch at the lower control arm (green arrow).
Figure 14

Something to note on reassembly, make sure the lower end of the rear coil spring is seated up against its perch at the lower control arm (green arrow).

As you jack up the lower control arm make sure the opening at the top of the rear coil spring fits around the mounting guide (red arrow).
Figure 15

As you jack up the lower control arm make sure the opening at the top of the rear coil spring fits around the mounting guide (red arrow).

You can use a combination of the jack and a pry bar (green arrow) to position the lower control arm inner mount until the mounting holes line up so you can install the fastener.
Figure 16

You can use a combination of the jack and a pry bar (green arrow) to position the lower control arm inner mount until the mounting holes line up so you can install the fastener.

Continue the installation steps by installing the rear rearward lower link fasteners and tightening them down.
Figure 17

Continue the installation steps by installing the rear rearward lower link fasteners and tightening them down. Fit the wheel and drop the car. Measure from the ground to the highest point of the wheel well on both sides of the car in the rear and make sure they are within a 1/2in. of each other.

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Comments and Suggestions:
Gersh211 Comments: The 1 blue and 1 yellow stripe has been replaced by 1 yellow and 2 blue not or the other way around. Not 2 and 2 though.
October 29, 2015
  Followup from the Pelican Staff: Thanks for the input on this one. We appreciate the help.
- Nick at Pelican Parts
 
dan Comments: did you use a coil compressor?
October 24, 2015
  Followup from the Pelican Staff: It is not necessary. - Nick at Pelican Parts  
dk Comments: I am attempting to do this, however my old coil springs only have 1 blue stripe and 1 yellow stripe. Does that mean they are not oem? Do you sell these for the rear of a 2003 e320. How do I know which ones I need?
October 22, 2015
  Followup from the Pelican Staff: I am not 100% sure. I’m not the best with part numbers.

Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 

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