This is not an AI description!  This listing is for a set of 4 GENUINE Mercedes belts.  Made in Germany, not china like all the new continental belts.  These will fit all W123 300D Turbo models, and possible also the 116/126 turbo models as well.  If you're unsure, just message me with a VIN and I can check.  Free and fast shipping from a Mercedes shop that's been working on these models since 1985.  Thanks!