Mercedes-Benz E320 CDI Questions

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How long have you had this problem? Few days
head rest moves fine,
Main battery died overnight, and vehicle was purchased used, without a valet key. Neither the engine key, nor the driver's switch will open the trunk, in order to access the main battery. How can I gain access to the trunk? Must I purchase a valet key? Will the valet key be based on the VIN?
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?
dealer says there is a break in the fiber optic cable in the trunk that feeds the radio. Mouse ate it so the dealer says. Need video to show me how to replace it. Cable is pt# 211 540 23 32
first nothing was wrong but now it just......
glow plugs
When the engine is cold, the glow plug light on the dash will not come on when the key is turned to the "ON" position. If I try turning it further, to the "START" position, the engine will not turn over. The glow plug light must come on and then go out, in order for the ignition to crank the engine and start. The only way to start it then is to leave the key in the on position for about 2 to 3 minutes. I then can turn it off an on, until the glow plug light comes on. Once that lights up and goes out, the engine will start. Once the engine is warmed up, the engine can be shut off and started under the normal procedure. I replaced the glow plugs with the Berar 5v plugs recommended. This has been an intermittent problem that seems to be getting worse in the colder weather. Could the be a faulty glow plug, relay switch or is there something else that I should be looking at?

We are looking at a Mercedes Benz E320 CDI (2006 model), which has been in New York for past 6 years. We are concerned it maybe rusted in areas not visible to us.Do all cars in New York get rusted?

Thanks in advance

comes and goes
Does anyone have a shop manual for a 2005 E320CDI? I want to purchase one,
I want to purchase one.
My car was in a rear end collision and the check engine light came on. The car has been fixed and the check engine light is still on. They told me that the filter needed replacing so they did that; $300 later and the check engine light is still on. Any suggestions?
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