Notices
Mercedes Tech Talk Discuss general technical questions and issues about your Mercedes-Benz. Moderated by a certified MB Tech.
Sponsored by:
Sponsored by:

W203 320 Engine dying?? HELP...

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jan 25, 2009 | 11:50 AM
  #1  
quasarman's Avatar
Thread Starter
Newbie
 
Joined: Jan 2009
Posts: 7
Likes: 0
C320
W203 320 Engine dying?? HELP...

Can anyone offer any ideas on the following?

Just had a major service including all filters, new plugs, fully synthetic oil etc etc. Not to mention new brakes all round at the same time!

At first everything was terrific, car had a new lease of life fired into it with improved throttle response and smoother running, great!

Now however the engine appears to have developed a problem in that it now randomly loses all power, no response to throttle at all and then cuts out all together. This is usually accompanied by a 'battery/alternator - visit workshop' warning on the dash. Aaaaah!!!

But when I turn off the ignition and start again there are no faults stored and the car starts perfectly normally. Then after a few minutes the whole thing happens again!!!

Can anyone PLEASE help- I'm hoping there may be a cable I can check for looseness or something of that nature....
Reply
Old Feb 22, 2009 | 10:45 PM
  #2  
fkellees's Avatar
Newbie
 
Joined: Mar 2008
Posts: 2
Likes: 0
1991 420 SEL
hey!! The first thing I would check for is for one or more loose connectors along with checking wire routing, ensuring no wires are shorting on eachother or grounding out. Again, thats where I would start.
Reply
Old Feb 22, 2009 | 10:51 PM
  #3  
brakel8's Avatar
Member
 
Joined: Jun 2006
Posts: 87
Likes: 0
From: USA
ML500 AMG pkg
Sounds like the air cleaner housing is not installed properly on the air mass sensor causing temp fluctuations and turbulance. Sometimes the seal is rolled or cut from tech's being to aggressive installing the air box back on the engine.
Reply
Old Jul 31, 2012 | 03:20 PM
  #4  
quasarman's Avatar
Thread Starter
Newbie
 
Joined: Jan 2009
Posts: 7
Likes: 0
C320
Forgot about this thread!

If anyone suffers the above symptoms following a fuel filter replacement check for fuel rail blockage. This was the source of my woes and I've since been told that because its such a common problem and that the fuel filter is very hard to see that MB don't bother to change them.

Surprising how a bit of crud manifests itself - that's the contamination rather than MB servicing (or is it!!!)
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 10:53 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