Some cars have an interlock to prevent DVD players being used while the car is being driven if there is a chance that the driver can see the screen. If that is the case, there should be no way to make the player work if the car is in drive.
This safety feature is mandatory in many US states and other countries. It may be illegal to tamper with the interlock and certainly is not recommended.
The one who has fuel running through his veins and vessels
It is very easy for a person to learn how to work, or use, a Mercedes Benz key. A person can go to sites such as YouTube to watch tutorials. A person can also ask an employee at a Mercedes Benz dealership to demonstrate how to use the key.
260,100 - (December 31, 2010) From daimler.com
You do not need anything out of the ordinary to work on Mercedes-Benz M-Class cars. If you know how to work on other Mercedes vehicles then you will be fine.
Mercedes Ruehl, Mercedes Benz. Does that work? * Glen Ford Ford motor company
Works when you turn off engine or radio.
Look up in your manual or let your mechanic do the work.
Most Mercedes-Benz sales consultants work on a small wage, usually less than $400 per week, and a commission on sales. The consultant usually receives a percentage of each sale.
A 1987 Mercedes-Benz 300D Turbo would lose acceleration and gas after engine work is done if the computer has not been re-tuned. Each change to the engine requires a number of adjustments to be made.
Check the fuse, if power lock fuse is burnt, replace it.
if it says unavailable you dont have the option installed. Open your trunk, on the drivers side you should have a panel. The navigation drive is in that panel, if its empty no navi, hence the unavailable msg.
sometimes when the lights blow out the fuse also blows out. check the fuse!!