Interesting check engine light 2010 e 350
Thread Starter
Member
Joined: Jan 2010
Posts: 170
Likes: 1
2010 E350
Interesting check engine light 2010 e 350
Hi everyone, my car has about 29k miles and I am getting Check engine light every time gas tank gets below 1/3 of it. I took it to the dealer twice now and every time they say "gas cap was opened while the vehicle was running". And that never happened.
Any advice or experiences can you guys share before I take it to the dealer next week?
Thank you.
Any advice or experiences can you guys share before I take it to the dealer next week?
Thank you.
Last edited by ash_cpe; Apr 25, 2013 at 09:45 AM.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,747
Likes: 20
From: Central Pennsylvania
2012 S350 Bluetec 4Matic, Diamond White, P2
perhaps you have a bit of water or other contaminants in the bottom of your tank. I would by a can of Sea Foam and dump it into a full tank and run it down. You may have to do this a couple times. I had this happen on a Volvo some years back. Water can condense on the inside of the tank when conditions allow it. Sea Foam will bind to the water and get it out of the tank. It is available at most Auto stores.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,747
Likes: 20
From: Central Pennsylvania
2012 S350 Bluetec 4Matic, Diamond White, P2
If the tankis not kept completely full, water can condense (sweat) on the inside of the tank. In diesels, there is actually a water separator to remove the excess water. In any event, Sea Foam is a great product suould your issue be related to fuel contamination. I still think the likely culprit is the gas cap or possibly an O2 sensor somewhere. It the code they pulled specifically points to the gas cap, I think the issue is self evident. You could always go buy a new gass cap and see if the problem goes away. If it does, I would have the dealership reimburse you for the cost of the cap.
Thread Starter
Member
Joined: Jan 2010
Posts: 170
Likes: 1
2010 E350
Last time with CEL, code showed something going on with fuel pressure and they checked the gas cap, did a "pressure test" and found no issues. But I am buying a gas cap even if they don't replace it this time.
Trending Topics
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,852
Likes: 196
From: Huntington Beach, Ca.
'17 Jaguar XF
There's a "sticky" for technical bulletins at the beginning of this forum. I seem to remember one about a leak at a plastic coupler from the fill tube to the tank? Maybe your VIN is affected.
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
MBWorld Fanatic!
Joined: Mar 2011
Posts: 1,315
Likes: 4
E55, SL63, ML550
Really?.. Come on man, cars now are far more complicated and if you think the computer just tells you what's wrong then you have no clue as to what you are taking about.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,852
Likes: 196
From: Huntington Beach, Ca.
'17 Jaguar XF
Yea, OBDII is pretty cool when you think about it.
Junior Member
Joined: Apr 2013
Posts: 19
Likes: 0
W212
I was referring to someone mentioning a gas cap can throw a CEL light.
