after using the w124 200 Benz several times at long distances in a day and upon starting the engine at night, before i shift to first gear, the engine stalls once or at most twice. however, when i started it, it started immediately and i can drive it again. What seems to be the probable cause for such symptoms. i just recently changed the fuel pump to try to correct the problem. other than that, the carburetor seems to be leaking and the air-shut off valve seems to be aint workin'. my mechanic told me to replace the trigger box for the electrical. my battery's new and my alternator's fine. what can you say about this guys?