Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi Luis, glad to hear you got it running. If the pump was running at reduced pressure it could certainly have caused a misfire but if you were only getting misfires for all 3 cylinders on one side of the motor I would still suspect a restricted catalytic converter. If it's running okay now I would just wait and see what happens.
Let me know if you need anything.