=====Suspension Bearing Bracket guide rod mount replacement =====
====on the 1985 300SD====
===by whunter===
===4/27/04===

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**USE AT YOUR OWN RISK.**
Personal opinion; even I do not like doing guide rods, with a full auto shop and hoist.
http://www.peachparts.com/diy/w126guiderodmount/Suspension_Brng_Brkt.jpg

***Bearing Bracket guide rod mount replacement for Mercedes Benz 300SD.***
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**1)** Raise and support front end.
**2)** Remove front wheels.
**3)** Loosen the clamp on #14 in picture.
http://www.peachparts.com/diy/w126guiderodmount/1985_300sd_suspension.gif

**4)** Remove the bracket that joins the Left and Right Bearing Brackets.
http://www.peachparts.com/diy/w126guiderodmount/n04.jpg

**5)** Remove the three bolts per side that hold the Bearing Bracket mounts to the body.
Note: this is where maximum difficulty is normal, due to the nut retaining tabs coming apart, please scroll down to Image-1 and Image-2.
Extreme precautions must be exercised if an oxygen acetylene torch is used.
http://www.peachparts.com/diy/w126guiderodmount/n05.jpg

**6)** Unscrew the guide rod mount from the guide rod.
http://www.peachparts.com/diy/w126guiderodmount/n06_15.jpg

**7)** Unscrew the four bolts from the Bearing Bracket backing plate.
http://www.peachparts.com/diy/w126guiderodmount/n07.jpg

**8)** Press the guide rod mount from the Bearing Bracket.
**9)** Clean the guide rod mount pocket of the Bearing Bracket, the old steel sleeve must be removed to a clean aluminum surface.
**10)** Grease the Bearing Bracket pocket, axle grease is ok.
**11)** Grease the guide rod mount tension sleeve, axle grease is ok.
http://www.peachparts.com/diy/w126guiderodmount/n11.jpg

**12)** Press the guide rod mount by the sleeve; into the Bearing Bracket, stop when it is flush or roughly one mm above the surrounding surface.
http://www.peachparts.com/diy/w126guiderodmount/n11.jpg

**13)** Install the rubber impact buffer pad between the rear of the guide rod mount and the Bearing Bracket cover, finger tighten the four cover bolts.
**14)** Tighten the four bolts in the Bearing Bracket backing plate.
http://www.peachparts.com/diy/w126guiderodmount/n07.jpg

**15)** Screw the guide rod mount into the guide rod.
http://www.peachparts.com/diy/w126guiderodmount/n06_15.jpg

**16)** Install and tighten the bolts that hold the Bearing Bracket to the body.
http://www.peachparts.com/diy/w126guiderodmount/n05.jpg

**17)** "Loose" install all the bolts that hold the bracket joining the guide rod mounts.
**18)** Tighten all the bolts for the bracket joining the Left and Right Bearing Bracket.
http://www.peachparts.com/diy/w126guiderodmount/n04.jpg

**19)** Tighten the clamp on #14 in picture.
http://www.peachparts.com/diy/w126guiderodmount/1985_300sd_suspension.gif

**20)** Install front wheels.
**21)** Remove front end supports and lower car.
**22)** Torque front wheel bolts.

If the Suspension Bearing Bracket is too corroded inside, don't repair or replace the guide rod mount, get a NEW Suspension Bearing Bracket !!!

**Note: this part number is the same for all W126 chassis.**
Call [[http://catalog.peachparts.com/ Phil]] for this part, it is not online.
1-888-333-4642
Mon-Fri 9:00a-7:00p ET
(NOT for technical support)

**Here are pictures of the old parts:**
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Image-1
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_1.jpg

Image-2
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_b2.jpg

Image-3
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_b3.jpg

Image-4
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_b4.jpg

Image-5
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_b5.jpg

Image-6
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_6.jpg

Image-7
http://www.peachparts.com/diy/w126guiderodmount/300sd_guide_rods_7.jpg

Image-8
http://www.peachparts.com/diy/w126guiderodmount/bad_guide_rod_mount.jpg

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[[http://www.peachparts.com/shopforum/showthread.php?t=92874 Discussion of this DIY can be found here.]]

**- whunter**
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CategoryDiy