Klima Design Works | W123 Sanden SD A/C Compressor Mounting Kit
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W123 Sanden SD A/C Compressor Mounting 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 original equipment Delco / Harrison R4 compressors fitted to most W123 Mercedes have a well-earned reputation for poor performance and short life. Upgrade your compressor now and say goodbye to the loud, leaky, short-lived R4. Our mounting & conversion kit provides you with all of the parts you need to install a durable, world-famous Sanden SD Series compressor in your car. No special tools required. No permanent modification of the vehicle. Use with either R-12 or R-134a refrigerant. Offered with or without compressor, and with ready to install hoses or unfinished fittings and hose.


Please select your vehicle model, compressor choice, and hose choice. Read full product description below. Kit is made to order; allow 7 business days processing time.



Flat rate shipping in USA starts at $15.00. Shipping Fees added at checkout. International rate varies.

SKU: KCKW123B Category:

We are the first and only company to offer a robust and elegant Sanden a/c compressor mounting kit for the W123. Brackets made in USA from the highest quality materials. 


Kit Contents:

  • Precision steel mounting brackets with yellow zinc protective finish
  • Metric hardware set with hardened fasteners (DIN/ISO)
  • All required hose & line components to complete the conversion included.
  • Complete HNBR o-ring set for entire a/c system included.
  • Illustrated installation instructions included in electronic form (PDF File).
  • OEM-compatible Delco male electrical connector and terminals included
  • New v-belt included.


Optional Components:

  • Genuine Sanden SD7H15 Model 4272 Compressor
  • Ready to install hose components (crimping fee applies)


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:

  • Kit uses a Sanden SD7H15 Model 4272 (7-cylinder) compressor. Available as an optional purchase.


Hose & Line:

  • Kit includes new high-pressure hose running from compressor head to condenser input. Original high-pressure lines (2 pieces) will be removed and replaced.
  • Original liquid lines (receiver drier to thermal expansion valve), and low-pressure suction lines (thermal expansion valve to compressor) will remain; make sure these remaining lines 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 heavy-duty steel fittings, as used with OEM system. Our fittings are manufactured exclusively for use with our kit and include custom sizes and combinations not available elsewhere.


Additional information:

  • 1985 Model Year California model kits (vehicles with trap oxidizer) available with uncrimped fittings only. Installer must crimp fittings to hose at time of installation.
  • Use with either R-12 or R-134a. If using R-12, be sure to drain PAG oil from compressor and refill with mineral oil.
  • Hose assembly with upgraded R-134a high-pressure side charge port; low-pressure side R-134a port adapter included.
  • No special tools to install; no cutting, welding, or permanent modification of vehicle.
  • Use with a parallel-flow condenser for improved performance with R-134a.
  • For best results, change receiver drier, TXV, and pressure switch.
  • Legal Disclaimer: For Off-Road Use Only


We support American Manufacturing Enterprises & Workers

Vehicle Model

W123 Turbodiesels 1981-85, W123 1985 California, 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 SD7H15 Model 4272


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


Brackets: Lifetime, All other components: 1 Year