R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

"Check Engine" light came on - then went off

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 12, 2010 | 10:20 PM
  #1  
Ted Flynn's Avatar
Thread Starter
Member
 
Joined: Jul 2009
Posts: 160
Likes: 0
2011 R350 BlueTec
"Check Engine" light came on - then went off

I have an 08 R320 with 60,000 miles on it.

About 2 weeks ago my "Check Engine" light came on. All fluids were okay and the car ran great.

I called the service manager and he stated that light comes on mostly because of emission sensors. He stated there are 18 of them and bring it in my next time when passing through.

Today the light came on with start up, but never stayed on.

Has this happened to anyone else?
Reply
Old Apr 13, 2010 | 02:53 PM
  #2  
yenlard55's Avatar
Junior Member
 
Joined: Aug 2009
Posts: 50
Likes: 0
From: sf valley, california
2006 e55, 2008 r350, 1998 lexus es300
this has happened to me many times. advisor always said it was sensors being too sensitive. no problems with the car.
Reply
Old Apr 15, 2010 | 04:40 PM
  #3  
memli's Avatar
Junior Member
 
Joined: Feb 2010
Posts: 28
Likes: 0
Mercedes R 320 CDI Sport 4Matic
Originally Posted by Ted Flynn
I have an 08 R320 with 60,000 miles on it.

About 2 weeks ago my "Check Engine" light came on. All fluids were okay and the car ran great.

I called the service manager and he stated that light comes on mostly because of emission sensors. He stated there are 18 of them and bring it in my next time when passing through.

Today the light came on with start up, but never stayed on.

Has this happened to anyone else?
after you fill up the tank with fuel make sure to hear that cup click a few times. tank air presure can switch check engine light on and off.
Reply
Old Apr 22, 2010 | 07:14 PM
  #4  
Ted Flynn's Avatar
Thread Starter
Member
 
Joined: Jul 2009
Posts: 160
Likes: 0
2011 R350 BlueTec
Well, after a new tank of fuel & "clicking" the cap a few times, the light has stayed off.

Little disappointed in the dealer for for saying the car reported a bad fuel rail sensor and it should be replaced. They should inform people of these potential fixes. (What a nice world that would be, huh?)

Needless to say, thanks for the help. Your advice actually saved me some money.
Reply
Old May 3, 2010 | 08:29 PM
  #5  
pepperpot53's Avatar
Junior Member
 
Joined: Apr 2009
Posts: 27
Likes: 0
r class 350
This happened to us with 06 R350 while on road trip south this past winter. As we were traveling we didn't want any problems so made an appointment with nearest MB dealer in Fla and it turned out to be just that...fuel tank lid. It couldn't work out better as this dealer had a cafe where you could order whatever you wanted for breakfast lol so we had a free breakfast and free car wash. We've had donuts, etc but never a full breakfast at MB dealers.
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 07:04 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