Hi everyone, first time posting here, I have a 2006 E350 4matic, my fuel pump failed last year and i had my mechanic fix it as the car wouldn't start anymore. After a day or two i got the car back and everything was fine. Before all this happened i always had an issue when i would fill gas more than halfway, there would be a gas smell in the car and in the garage. That stayed the same after the fuel pump was fixed. During that same year i had other issues with my car and by that time I had changed mechanic because i moved to another city. I ended up telling my new friend that i was tired of having the gas smell and not being able to fill my car up all the way. After a quick look he saw a bent hose that was maybe leaking the smell and he fixed it. The smell stayed, it was reduced a lot, i was now able to fill gas all the way but the smell was very minimal, i would say 15% of what it was before. I called him back and said the smell didn't fully go away and i was having other issues as well so i brought him the car yesterday. He calls me today and says after he opened the fuel pump compartment he saw something he couldn't believe. He said it wasn't installed properly at all and could have killed me as the wires were loose and if they came in contact it could have caused a spark and basically blew up the car. I'm pretty pissed at this situation especially since i have been using the car everyday and i drive my kid to daycare back and forth.

Here are the pictures posted above

Can you please tell me what you think? Any mechanics can chime in please ? By the way money was never an issue for this repair and i was ready to replace the whole pump.

Thanks in advance

Thank you, and thank God i dodged a bullet too. But this got me thinking, you buy a used car, what if this was done to a used car and you would never know until it's too late ? If i had taken the car to the dealership for a diagnostic test and check up would this have come up in their results? Do they routinely look in there if there is no error codes or issues ?

Good to hear that but my mechanic said that for mb parts, the wires attach with clips(sealed), whereas my wires were exposed and no sheath around them as someone got creative. But most importantly would the dealer have found out during a diagnistics appointment? if i had not complained or anything. How thorough is the diagnostic appointment ?

if you look at second picture it is the yellow and blue clips that are installed with those tie wraps that are not conventional mb installations. He said if blue and yellow wire touch it would spark. They could have gotten loose.