azhari - go after the fuel leak/smell first. Not good. Then figure out the hard start problem.
I think you are on to something regarding the fuel pump. Check to see if the fuel filter has been replaced recently.
Often fuel leaks and problems can easily be found on the cars by removing the air cleaner housing. Gives you a good view.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)