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Pelican Technical Article:

Wheel Carrier Removal

Steve Vernon

Time:

3 hours3 hrs

Tab:

$25 to $800

Talent:

***

Tools:

32mm 12 point socket, 21mm, 18mm, 13mm wrench, 5mm Allen, M12 12 point, 15mm socket, E12 socket, large breaker bar or impact wrench

Applicable Models:

Mercedes-Benz C250 (2012-14)
Mercedes-Benz C300 (2008-14)
Mercedes-Benz C350 (2008-14)

Parts Required:

Axle nut, mounting hardware

Hot Tip:

Loosen the 32mm bolt first

Performance Gain:

Proper alignment

Complementary Modification:

Replace wheel bearings

Removing the rear wheel carrier on the W204 is not a quick or easy job, but if you take your time and follow these instructions you can remove and replace the carrier in an afternoon. Remember when removing suspension hardware that Mercedes considers all suspension hardware to be single use only and must be replaced. Also remember that the wheel carriers are specific to each side of the car; make sure to order the correct one for your vehicle as they are usually special order and not returnable.

You will need to remove the 32mm 12 axle collar nut from the axle. If you do not have an impact gun make sure you break loose the axle nut while the car is on the ground. The nut is on under a tremendous amount of torque and the simplest way to do this is to use an impact wrench or gun to break the nut loose. Electric impact guns can be purchased inexpensively now and make a great addition to your tools kit. If you do not have an impact gun, depending on your rims, you can remove the center cap on the wheel, leave the car on the ground and insert the 32mm 12 point socket through the center. Next, place the largest breaker bar you have on the socket and break the bolt loose. I ended up having to put a three foot pipe on the end of the breaker bar to get enough leverage.

Raise and support rear of vehicle on jack stands. See our tech article on jacking up your vehicle.

Remove front wheel from side of vehicle you are replacing the drive axle on.

When removing the axle you will need loosen the 32mm 12 point nut on the axle (yellow arrow), if you do not have an impact gun the best way to do this is pop off the center cap on the wheel and with the wheel on and the vehicle on the ground use a very large breaker bar and loosen the nut before raising the vehicle.
Figure 1

When removing the axle you will need loosen the 32mm 12 point nut on the axle (yellow arrow), if you do not have an impact gun the best way to do this is pop off the center cap on the wheel and with the wheel on and the vehicle on the ground use a very large breaker bar and loosen the nut before raising the vehicle. If you already have the vehicle in the air and do not have an impact gun the pressure from the rear caliper (red arrow) will not be sufficient to hold the rotor in place when trying to break the nut loose.

The axle collar nut will have a section of it that is folded into a gap I the axle, use a punch and tap the metal out (red arrow).
Figure 2

The axle collar nut will have a section of it that is folded into a gap I the axle, use a punch and tap the metal out (red arrow). This will allow you to remove the 32mm 12 collar nut.

You will need to remove the brake caliper, pads, rotor, sensors and parking brake to get access to the two 5mm Allen bolts (yellow arrows) and the two 13mm bolts (blue arrows) that hold the dust shield on.
Figure 3

You will need to remove the brake caliper, pads, rotor, sensors and parking brake to get access to the two 5mm Allen bolts (yellow arrows) and the two 13mm bolts (blue arrows) that hold the dust shield on. Please see all of our articles on removing the brake and parking brake system for additional assistance and make sure to safely hang the caliper up out of the way (red arrow), never let it hang by the brake line.

Once you have removed the parking brake remove the 5mm Allen on the rear of the carrier and pull the parking cable backwards, this will allow you to unfold the spreader (red arrows) and remove the small pin holding it to the cable.
Figure 4

Once you have removed the parking brake remove the 5mm Allen on the rear of the carrier and pull the parking cable backwards, this will allow you to unfold the spreader (red arrows) and remove the small pin holding it to the cable. Remove this and pass the cable back and out of the carrier.

Support the swing arm with a floor jack and raise the arm until the axle is almost parallel to the ground then with the dust shield free to move you can spin it around and remove the camber strut (red arrow), torque strut (yellow arrow), tie rod (blue arrow) thrust arm and the control arm (not shown) where the connect to the wheel carrier.
Figure 5

Support the swing arm with a floor jack and raise the arm until the axle is almost parallel to the ground then with the dust shield free to move you can spin it around and remove the camber strut (red arrow), torque strut (yellow arrow), tie rod (blue arrow) thrust arm and the control arm (not shown) where the connect to the wheel carrier.

Lower the jack and pull the wheel carrier forward.
Figure 6

Lower the jack and pull the wheel carrier forward. If your axle is stuck in the bearing in the wheel carrier you can use a three arm puller (red arrow) to gently walk the axle out the back of the bearing otherwise the wheel carrier should be pulled outward and down freeing the axle from the carrier. If you try just yanking on the carrier to get the axle out you will just end up pulling the axle from the differential so use a puller.

Use care as once the carrier comes off the axle it will be free and it is heavy.
Figure 7

Use care as once the carrier comes off the axle it will be free and it is heavy.

Whether you are going to transfer the bearings and hub to the new wheel carrier or just need to get the dust shield off you will need to remove the four E12 bolts (red arrows).
Figure 8

Whether you are going to transfer the bearings and hub to the new wheel carrier or just need to get the dust shield off you will need to remove the four E12 bolts (red arrows).

Remember these bolts are single use only and specially shaped so order them in advance.
Figure 9

Remember these bolts are single use only and specially shaped so order them in advance.

With the bolts removed you can remove the bearings and hub as a single piece, you can also remove the dust shield.
Figure 10

With the bolts removed you can remove the bearings and hub as a single piece, you can also remove the dust shield.

Here is the old carrier with everything removed.
Figure 11

Here is the old carrier with everything removed. Installation is the reverse of removal.

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Comments and Suggestions:
Tisdale36 Comments: Does the 32mm nut have reverse thread on rear passage side?
August 16, 2016
  Followup from the Pelican Staff: Unlikely. What vehicle are you working on? - Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:58:53 AM