Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi Randy, sorry for the wait I have been away. I'd recheck the fuel system rest pressure when hot. I'd leave the gauge connected and see what your pressures are when you are actually experiencing the problem. It does sound like you are losing rest pressure somewhere and causing a vapor lock. If the problem eventually clears and it runs fine I'd say it is vapor locking. Dribbling injectors or a leaking pressure regulator in the fuel distributor or a bad accumulator or fuel pump check valve are some possibilities. If the only problem that you are experiencing with the car is the hot restart I would be looking for pressure loss.
Let me know if you have any questions.