Nope; that is for the next generation of the injection system.
It does look like this:
Mercedes Warm Up Regulator Bosch 0438140068 Fit 380SL*380SEC*450SL*450SLC*500SEC | eBay

Prior to considering a replacement of a somewhat expensive part (the WUR), the o-rings on the fuel pressure regulator (FPR) should be inspected/replaced. The FPR is located on the side of the fuel distributor (FD), and has a hex head/cap.
Are you performing work yourself, or relaying these comments?