W123 Factory Aircon rebuild using new MB R4 Compressor - PeachParts Mercedes-Benz Forum

Screwdriva · #1 08-14-2020, 04:41 PM

Greetings!

After much research, I've decided to go with a new R4 compressor from Mercedes for my 84 300D NA Automatic. Sells new from Mercedes for around $720 with a 2 year warranty. It would cost me a similar amount to import a Sanden and corresponding mounting kit to the UK and saves me the hassles of fabricating hoses to accommodate RHD clearance issues. We don't really use air-conditioning in the UK for more than a 2-3 weeks a year, so the major benefits of the Sanden solution (economy, power drain etc.) are minimized to some extent.

I have 2 questions I hope someone with experience doing this can help with:

A. I plan on replacing the following. Condensing radiator was newly installed a couple years ago and is unused. Am I missing any must replace parts?

1) Aircon Receiver dryer - Part #1238300683

2) Aircon Compressor - Part #0002304711

3) Aircon Expansion Valve - Not sure what the correct part number is.

B. Any sequence of what to flush/ oil/ install etc.?

Many thanks in advance!