S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

MASSIVE FUEL LEAK....days after new Mann fuel filter installed???

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jun 9, 2021 | 06:38 PM
  #1  
tackleberry23's Avatar
Thread Starter
Junior Member
 
Joined: Jul 2011
Posts: 16
Likes: 4
S420
MASSIVE FUEL LEAK....days after new Mann fuel filter installed???

Hi, so sunday, changed the fuel filter and car ran better, and starts up immediately now (had long cranking issue) when i changed the fuel filter, i matched it accordingly, and changed hoses one by one (TANK hose to TANK hose, then PUMP to PUMP, etc one at a time, treating it like an old school distriubutor)

all day sunday, monday, tuesday no prob. no smells, no funky idle, immediate starting, power has been great etc. I think back, and recall tuesday i did notice a little hiccup at one point, kinda random......but no issues otherwise.

this morning, on my way to work, noticed dead spots in the gas pedal, and the car was chugging a bit then it was fine. i get to work and smell gas, but notice no leak, or wet spot on the cover for the pump/filter.

first assumption, may a clamp was a bit loose. i come back 9 hours later, see no gas, smell mostly all gone, i drive home. 3/4 way home, started noticing a loss of power.

I park the car, jack it up, notice the cover was a little wet. i remove it, see wet on the hose (center hose on back of the filter) and i tightned it up more, it wasnt really that loose, but did take more to tighten it.

I get back in the car, start it up, drive....power was fine again, but then it started sputtering at stop lights, then noticed loss of power again, and this time found gas POURING out the back of the car (see pics)

thoughts? im gonna take covers off tomorrow or friday, but wow, this was pretty random, is it possible the fuel filter internally failed???



Reply
Old Jun 10, 2021 | 02:50 PM
  #2  
tackleberry23's Avatar
Thread Starter
Junior Member
 
Joined: Jul 2011
Posts: 16
Likes: 4
S420


found the leak, i dont think gas shold be pouring out of this so ill have to assume this is shot.

i want to add this, i had ZERO gas smell or leaks or loss of power with the old fuel filter.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 12:50 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE