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ERG valve and Clogged intake Manifold

(2005 Mercedes-Benz E320 CDI)
in Pewaukee, WI on April 19, 2011
I just purchased a 2005
Problem with 2005 Mercedes-Benz Mercedes Benz E320 Cdi
I just purchased a 2005 Mercedes E320 CDI with 45,000 miles. Just before I bought it the owner had the intake manifold removed and cleaned. The Mercedes dealer he went to said this was not an unusual problem for Mercedes diesels around 50,000 miles.. (Cost $1500). The service light had been on and off periodically and the car was at times sluggish when when pulling away from a stop. The auto sales person told me I should use a product called "Red Line" every 3rd fuel fill-up. I went to another Mercedes dealer after I bought the car and they said they hadn't sold "Red Line" for quite a few years. Two service advisers there said they had never had to clean an intake manifold on a Mercedes since they were there (I don't know how long they were there.) Is that a common problem with the 2005 E320 CDI and what should I do to prevent it. (Use Red Line???)
Displaying 3 answers & 2 comments
Popular Answer
of Overbys Inc on April 20, 2011
an MB dealer would never sell a product like Redline because it is not from MB. you really need to find a good
local MB specialty shop to advise you correctly. the dealers are never going to shoot straight and will be
contantly in your wallet.
on June 13, 2013
First of all you have a very fine car..! Purchase a new one in 2005, and went through the same issues at 60,000 miles. I'm the type person that always wants to know why something failed prematurely. These cars recommend sythetic motor oil. Synthetic oil is great for reducing wear, but has an issue in diesel engines. It's called "Coking". Switch to a Para-Synthetic or a one quart of oil for one quart of Marvel Mistery Oil with each oil change. This reduces the amount of coking in the engine. Change oil every 5000 miles when possible.
I have a MB E320 CDI with 230,000 plus miles and add Marvel Mistery Oil to the Oil and Fuel. The newer reduced sulphur fuels are much better for these engines. Remember to do an Italian engine tune-up every couple weeks to clear the turbo.
I use Moble 1 or Castrol 10W30 Synthitic with Marvel Mistery Oil. My car is serviced every 5000 miles and gets 33-36 mpg city and 39-46 mpg highway.

J Parsons, PE

on July 02, 2013
Can you explain the procedures for the "Italian Tune-up"?
Also, do you have any other methods for maintenance that you use in addition to what you've stated?
You're comments are appreciated.
on April 19, 2012
I have the exact car with the exact problem. How was it fixed? I brought it in for regular maintenance and developed this problem. After $800 for a new gas filter, now they want to replace the manifold, a $2,000 part!
on April 21, 2012
Manifold repair, answer #2. What did you end up doing, why and what did it cost you. Icabod.
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