I spoke to the guy told him either fix it with MB parts or take the repair off the top. I was able to see this from the access door for changing the bumper mount fog lights. from below (always worth giving your indy $25.00 to put the car on a lift

. I got nothing against a DIY repair, but this repair job was lacking, which was eveident by the oil leak. If a perspective buyer sees such a repair, it could be a deal breaker.
Yes it also has the cold start stumble and I can see some air bubbles comming from what might be the fuel heater. I know these cars are plauged with bad fuel line seals and o-rings on the fuel heater any further imput is appreciated. She starts fine after warmed up...now you have me wondering about glow plugs. Supposedly the fuel lines and seals had just been changed.
The car has no codes and the message center is clear after she starts (other than a service alert, saying 700miles over due, ya think you'ld want to clear that before trying to sell a car