Pinging or Rattling Noise

Tiny
JESSY S
  • MEMBER
  • MERCEDES BENZ
Dear Bob and Ken, I'm based in Taiwan and my car is a 2006 Model Mercedes Benz W211, E 280 (3000c.C.) V6 GAS, Done only 9300 Kms, Automatic Trans. Lately, I noticed after driving for about 15 mins. After start. I hear a rattling noise from the engine everytime I accelerate even if I was driving alone without any load and in almost any shift, first to fourth or fifth gear I guess. And also a VERY VERY slight knocking noise like a diesel engine on idle. I had it a complete computer check and a tune-up. The Knocking Sensors are ok, the spark plugs are very clean, the air filter is replaced. But still didn't eliminate the noise. I use 95 & 98 octane which I believe is only an equivalent of 91 & 93 octane in the US. The knocking noise is much often and obvious when I use 95 octane. But, although the noise is lot lesser when I use 98 octane, somehow its not 100% gone. Power is ok both with 95 or 98, just slightly more powerful with 98. I've read a lot of your answers about the EGR valve and I'm planning to have it changed as probably it wasn't detected by the computer analysis. With respect, my question is what else could I do if after replacing the EGR and still has the noise? I only have 9300kms on it and its almost new. Does this normally happen on a very low mileage car or could it be a factory defect? Your answers will be highly appreciated. Thank you and All the best. Jessy S
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Tuesday, November 13th, 2007 AT 8:54 AM

10 Replies

Tiny
M_H_RITZEL
  • EXPERT
Checked buletins on it and did not find any. Under cylinder knocking noise I came up with, the injector nozzle sticking or low nozzle open pressure.
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Tuesday, November 13th, 2007 AT 10:05 AM
Tiny
JESSY S
  • MEMBER
Thank you for the advice. But, the car has only run less than 6k miles. Cuz I've heard some car owners saying they only have their injector nozzle cleaned or replace after doing 30k miles. Anyway, I will definitely have it checked immediately. Thanks again! - Jessy S
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Friday, November 16th, 2007 AT 5:58 AM
Tiny
M_H_RITZEL
  • EXPERT
With only 6000 k on it I would take it back to the dealers and let them know about the problem.
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Sunday, November 18th, 2007 AT 9:01 AM
Tiny
JESSY S
  • MEMBER
Hi ! Mike,
Thank you for your reply. And yes, that was the first thing I did. I brought it to the dealer to have it checked. Aside from a tune-up and some computer diagnosis, there was nothing they could do. They just couldn't fix the problem. And because I bought this car from the gray market dealer and not from the main distributor of MB in this region, they are not covering any warranty for cars sold by other importers because they said they are just the main distributor and not the representative of MB. And, even if I'm sure this is a problem of a factory defective car particularly the engine in which I believe the main office of MB GmbH should be responsible of. I'm sure even if I send a message to the main office in Germany about this problem, they will not give any attention or effort to fix this problem assuming it is really a factory defective car. Because, for over a century of popularity and reputation, a few complaints like this won't actually hurt their name and status in the market, I guess. In my opinion, these people are very unprofessional leaving this kind of problem to ourselves to fix without giving any warranties and assistance.

Once again, Thank you for your effort and concern. - Jessy S
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Monday, November 19th, 2007 AT 1:16 AM
Tiny
JESSY S
  • MEMBER
A PRO car mechanic backed with a 25 year experience made a thorough check with my 2006 MERCEDES BENZ E280 which has done only 9300K (5780 Miles). He emptied the tank and filled in 98 octane gas and adjusted the timiing to 98 octane compatibility; checked the KS (Knock Sensors) and the EGR Valve (Exhaust Gas Recirculation Valve); cleaned the injector nozzle; checked the whole cooling system; replaced new spark plugs and air filter; changed the motor oil. He said that its not necessary to open the engine or the engine block considering the mileage it has ran. His conclusion was some engines runs just a little bit hotter than normal that is causing the slight pinging noise. Could'nt stop wondering what went wrong here. Considering its a Benz. My previous car was a 2001 BMW 525 for almost 6 years with almost 60,000 kilometers on it, which I never had any problem with anything, power was great, acceleration was very smooth and very quiet.

So guys, just a friendly piece of advice, 'BETTER THINK TWICE ABOUT THE NAME THE NEXT TIME YOU CONSIDER BUYING A NEW CAR'.
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Friday, November 30th, 2007 AT 2:04 PM
Tiny
JESSY S
  • MEMBER
Last night, I had a chance driving a friend's LEXUS GS350. Man! I couldn't believe what I was driving was a Japanese car. Acceleration was the smoothest car I 've ever drivin' at this price range. Th horsepower and torque was beyond comparison to my BENZ E280. DAMN ! The ride was so quiet and smooth I didn't realize I was already doing 120 KPH way pass the speed limit here. And, all the features and options, Wow! And, the most ridiculous thing is this LEXUS GS350 is USD 15,000 cheaper than my BENZ E280. Not to mention that the E280 has only a 3 liter engine and the GS 350 has 3.5 liter engine. Please don't take my word for this. Drive it for yourself and you'll see what I'm saying. Cuz, it would probably take the whole afternoon writing, to tell you guys the details. Jessy S
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Saturday, December 1st, 2007 AT 11:57 PM
Tiny
MADMANOZ
  • MEMBER
Cams are chattered. May need cams and lifters
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Saturday, January 5th, 2008 AT 12:50 PM
Tiny
M_H_RITZEL
  • EXPERT
Jessy, With only 9300klm on the car and a mechanic said it might be running hot. I would try putting a lower temp thermastat in it and see if that helps.
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Monday, January 7th, 2008 AT 11:39 AM
Tiny
OTKOMELHER
  • MEMBER
Hi Jessy,

Mate just wondering did you manage to find the problem to this noise? I have exactly the same problem with my E280 07 Avantgarde and no one can really tell what it is. Have got told to replace the fuel filter as it can be clogged up but then others say the fuel filter lasts 220,000km or 10 years without replacing. Would be great if you can provide me with some feedback if the problem got fixed.

Thanks
Otto
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Friday, October 7th, 2011 AT 9:11 AM
Tiny
FIXITMR
  • MEMBER
Anyone come up with a practical answer yet?
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Saturday, October 29th, 2011 AT 11:49 PM

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