Hello, working on a 1996 E300 W210 606.912

Have had a problem with the car for a couple of months now that started with it shutting down after long trips. I posted about it when I was traveling and was stuck out of town and saw bubbles in the lines. I installed an electric pump in-line at the firewall and it drove great for the 6 hour trip home.

Since then all of the clear lines have been replaced and the shut-off o-ring and the banjo bolt o-ring and crush washers, but still a stream of small bubbles from the banjo bolt return line from the right side of the IP and from the return line from the shut off valve. Have replaced the o-ring and crush washers there 3 times and then suddenly yesterday a leak appeared from the gasket on the back of the IP and it is a bad one, very steady flow while just running the electric pump to prime before starting the engine.

What can be leaking from internal Injection Pump?

Notice the drip of fuel just above the paper towel at the gasket at the rear end of the IP.

Thanks for reading.

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