Klima Design Works | W123 Sanden SD A/C Compressor Conversion Kit
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Compressor-Kit-Contents C
Compressor-Kit-Contents CBrackets & hardware on compressorRear Head SetupReplaces Delco R4Comp-Plain-1024x787

W123 Sanden SD A/C Compressor Conversion Kit


For W123 diesel Mercedes originally fitted with Delco R4 compressors (1980-1983 240D; 1980-1985 300D, TD, & CD)


Tired of a/c compressor failure in your W123? The OEM General Motors Delco R4 compressors fitted to W123 North American market Mercedes have a well-earned reputation for poor performance and short life. Upgrade now and say goodbye to the loud, leaky, and short-lived Delco R4. This conversion kit provides you with everything you need to install a durable, world-famous Sanden SD Series compressor in your car. A must if you plan to run R-134a refrigerant. Offered with either uncrimped a/c fittings and hose or with ready to install hoses.


Please select your vehicle model & hose choice. Read full product description below. Kit is made to order; allow 7 days processing time. Compressor not included.



Flat rate $15 shipping in USA. Shipping Fee added at checkout. International rate varies.

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SKU: KCKW123B Category:

Upgrade your OEM system to use a durable Sanden SD Series compressor – the standard choice for heavy duty vehicle builders and original equipment manufacturers. Now you can get the smooth, quiet, reliable performance of a Sanden in your Benz. Join hundreds of other enthusiasts who have converted to a Sanden using our kit. We are the first and only company to offer a robust and elegant Sanden conversion for the W123. The kit requires no special tools to install, and requires no cutting, welding, or permanent modification of the the vehicle. Brackets designed and made in USA from the highest quality materials.



Kit Contents:


  • Complete step-by-step illustrated instructions with torque specifications and data
  • Precision steel mounting brackets with yellow zinc (gold) finish
  • DIN/ISO metric hardware set with hardened fasteners
  • Complete HNBR o-ring set for entire a/c system
  • All required hose & line components to complete the conversion
  • New v-belt included. 


Vehicle Model Compatibility:


  •  For W123 diesel Mercedes originally fitted with Delco R4 compressors (1980-1983 240D; 1980-1985 300D, TD, & CD). Please visually verify that your vehicle has an R4 before purchasing. Click here for a picture of an R4 Compressor. 


Compressor Compatibility:



Hose & Line:


  • Kit includes entirely new high side hose running from compressor head to condenser input. OEM high side lines (2 pieces) will be removed and replaced.
  • OEM/Original liquid lines (receiver drier to thermal expansion valve (TXV), and low side suction lines (TXV to compressor) will be re-used.
  • Make sure all original/OEM lines retained are in good condition before installing kit.
  • Available with either ready-to-install hose components, or with hose and uncrimped fittings (installer must crimp fittings with appropriate tool).
  • We use only Goodyear Galaxy full barrier hose for durability and multi-refrigerant compatibility. 
  • Kit uses only heavy-duty steel fittings, as used with OEM system. 


Additional information:


  • Use with either R-12 or R-134a.
  • Set up with R-12 charge ports by default; use standard adapter kit for use with R-134a.
  • No permanent modifications to vehicle.
  • Flush system thoroughly before installing.
  • Use with a parallel-flow condenser for best results with R-134a.
  • For best results, change receiver drier, TXV, and pressure switch.


Vehicle Model

All W123 Turbodiesels 1982-85, W123 Non-Turbo 300D,TD,CD 1980-85, W123 240D 1980-83

Hose Fittings

Uncrimped Fittings & Hose, Ready to Install Fittings & Hose

Compatible Compressor Type

Sanden SD5H14 Model 6630, Sanden SD7H15 Model 4272, Use these models only


Flat rate shipping in USA (applied at checkout), International shipping available (contact us)


Brackets: Lifetime, All other components: 1 Year