Car is a 1992 400E (180k mi.) and after having spent a good deal of time on the engine and mechanicals I am now transitioning to cosmetic refreshing. Also, thank you to the dedicated members on this site for providing most of the info I have used in the process!
I have searched quite a bit (apologies if I have missed this), but can't seem to nail down the proper parts for the "Antinoise capsule" or splash guards/etc. So far I have deduced that the diesel, gas, and V8 variant w124's have different parts for this system. Also, I have found that the system is comprised of three or four parts (2 side pieces and the underbody splash guard thing, and possibly a rear piece). Using the VIN, I came up with these numbers:
124-524-27-30 Main, front splash guard, under engine
124-524-20-30 Side, right side panel
124-524-21-30 Side, left side panel
124-524-38-30 Rear, bottom "sound absorber", (behind cross member?)
If you could let me know if these are accurate and/or available, I would greatly appreciate it. I am mostly interested in the main splash guard, as it appears to also help channel air through the radiator and keep the engine in its proper environment per design. (I also know that there are many/most? who run without this with no harm, but I would like to address this during the cosmetic refresh.) Thank you!