A/C Compressor
If you put your car info into amazon, it tries to show you appropriate parts that will fit.
For my e320 bluetec 2008, replacement DENSO AC compressor was 450-600$. The complete kit I purchased (incl. drier/expansion, pag oil and replacement seals) was $330. The seller in Amazon was buyautoparts.com
You can purchase direct from their website, https://www.buyautoparts.com/.
I was more comfortable dealing direct with Amazon, hoping for leverage in case of issues... and thus I purchased through Amazon.
This site is good to find exact MB part numbers:
https://mbparts.mbusa.com/
Whether or not you go with OEM or some no-brand cheaper parts, is up to you.






