2005 Mercedes-Benz E320 CDI Questions

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How long have you had this problem? Few days
head rest moves fine,
My local mechanic could not find problem and also suspected a control module. Recommended dealer diagnose the problem. What is average repair cost to replace the CDI controller?
glow plugs
comes and goes
Does anyone have a shop manual for a 2005 E320CDI? I want to purchase one,
I want to purchase one.
After driving at highway speeds for any length of time, after i pay a toll or slow down, my car does not want to move. The engine does not race, and after a while eventually the vehicle will pick up speed.
2005 Mercedes E320 CDI - where is located the glow plug control module/relay?

The buzzer sounds even when no passenger is in the front seat. It will shut off only if I click the seat belt shut.
My a/c recharge kit hose fitting fits 1999 300D that is is a 134a system but seems too small for the 2005. Did they go to a larger fitting or something and should i be able to get an adapter or is this a MB only trick?
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???)
vibration at speed over 60 mph
At about 50-60 MPH I can hear a annoyng noise coming ( I think so) from left front wheel also a light vibrations in stering wheel can be feeled.I balanced all four wheels and no help,
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