Mercedes-Benz W123 Coil Springs Info and Tips - Lifting, Lowering or Handling Improvements

This Blog is a work in progress to gather as much info as i can about the W123 Coil Springs. This blog will discuss Lifting, Lowering or improving handling over the OEM setup. If you have any input feel free to comment below or message me. Thanks very much and keep having fun out there!

Lowering Your W123 Mercedes(240D, 300D, 300CD, 300SD, 300TD and More)

1. H&R Performance Coil Springs

H&R Sport Springs are the ideal solution for the enthusiast who appreciates race-bred components designed for street use. 

Product Benefits:

  • Sporty appearance
  • Improved handling characteristics
  • Lowered center of gravity
  • Linear or progressive spring design
  • Compatible with OE and aftermarket shock absorbers
  • Powder coated for enhanced appearance and corrosion resistance
  • Delivered with ABE or TUV approval
  • Engineered, manufactured and tested in Germany
  • Set of 4 Springs
  • 29634-1 30/30mm 4cyl
  • 29635-1 30/30mm 5cyl
  • 29535-1 50/50mm 4cyl
  • 29536-1 50/50mm 5cyl

Fits:

1976-1985 Mercedes-Benz W123 Sedans and Coupes with 4 or 5 Cylinder Engines.

*Product ships from Germany and can take 4-6 weeks*

Available On ebay and found on my website here: https://lermscustoms.com/collections/mercedes-benz-tools-and-parts/products/mercedes-benz-w123-h-r-coil-springs-lowering-kit

 

2. Lerms Customs Lowering Kit

W123 Coil Spring Lowering Kit w/ Bilstein HD Shock Absorbers

 

3. DIY Cut Coil Springs

You can get New or Used Coil Springs and cut them yourself. Here is a short list of some of the possible combinations and the outcome. You can also buy pre cut coils from me found at: www.LermsCustoms.com 

  • .5/.5 Very slight almost no change. Keeps OEM Rake
  • 1.0/1.0 Slightly Lower. Keeps OEM Rake
  • 1.0/1.5 Sightly lowered Rear. No tire issues
  • 1.5/1.5 Noticeable lowering with no tire issues. Keeps OEM rake.
  • 1.5/1.75 Car becomes Level
  • 2.0/2.0 Some tire issues that can be corrected with tire/wheel/fender rolling. Keeps OEM rake.
  • 2.0/1.5 Some tire issue that can be corrected with tire size/wheelsize/fender rolling. Increased rake
  • 2.0/2.25 Some tire issue that can be corrected with tire/wheel/fender rolling. Car is now level, no rake. 
  • More cutting and you will run into further issues and be pushing the limits. It can be done but done so at your own risk. Message me for any custom Cuts or Builds. 

 

 

 

 

Lifting your W123

 

There isnt a whole lot of info or companies who specialize in any offroad performance for our cars. Im working slowly to start building that up and gathering more info. If you have any tips or info on what you have done please comment below or message me. Thanks!

 

1. Africa/Safari Springs

These springs seem to be a bit impossible to find. Everyone seems to mention it but noone has a source to get them. If you have a part number let me know. Thanks!

 

2. Lemforder Increased Height Springs

This pretty much goes for the same above except i used to have the part number and lost it. Ive seen these taller coils installed but need some more info. 

3. W126 Rear Coils 

Ive seen a lot of people mention just using a W126 spring with a larger coil spring pad. This does increase by a little but mostly just because of the pad and stiffer spring. No real increase in ride height or performance. 

 

4. Spring Pads 

Shim, front spring 8 MM thick, one burls
MB# 123 321 13 84

Shim, front spring 13 MM thick, two burls
MB# 123 321 14 84

Shim, front spring 18 MM thick, three burls
MB# 123 321 15 84

Shim, front spring 23 MM thick, four burls
MB# 123 321 16 84
++++++++++++++++

Shim, REAR spring 9.5 MM thick, one burls
MB# 115 325 22 44

Shim, REAR spring 14 MM thick, two burls
MB# 115 325 23 44

Shim, REAR spring 19 MM thick, three burls
MB# 115 325 24 44

 

5. Specs for a Custom Design

If anyone wants to partner with me to design a true lifted coil spring for these cars that would be great. It seems like the best route to go. It wouldnt be the biggest seller but if we can get a group buy of about 10 people i could get a big manufacturer to build them. 

 

Please comment below with any input you have. Feel free to message me anytime. Keep enjoying your cars and have fun!!!

 

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1 comment

  • Hi, I’m currently restoring a 1981 300TD wagon. I plan on a small lift and all terrain tires on the original 14" bundt wheels. I want to make it look similar to an old photo I saw of the MB roadside assistance wagon in the snow from the early 80s. I’m thinking ultimate expedition wagon. I’ve read about using w126 springs, but wondering what you think would be the best route to go. Thanks!

    Eric

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