The M pump is in the 2nd drawing (this is one for a 300D turbo). Notice it has Crush Washers and O-rings tos seal the Delivery Valve Holders. The IP on my car is the 1st drawing and has only Crushwashers to seal the Delivery Valves.
I have not read of anyone replacing the O-rings on their M pump. But, this could be because there are not many around.
Notice that the Fuel Supply Pump is different and that the Hand Primer is in a different position.
http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=123193&M=617%2E952&GA=722%2E120315&CT=M&cat=143&SID=07&SGR=045&SGN=01