my 2008 ml350 navigation it keep saying insert dvd (wont read it )
please help anyone..

Mine is also. It has been intermittent but now is happening more often. Best I can find out is that the Nav dvd player needs replacing. I've got a question about repair centers on another forum. If I hear anything, I'll update here.

first i thank you for answering me that fast, well i forgot to mention that i just bought the SUV used and with out the NAV DVD. i just ordered one from EBAY for $78.00 (the only think was in the car is DVD cover )and the guy who soled me the DVD had asked me to Email him the photos of that DVD cover for perfect match ....but like i said it wont read it .i had called the guy back and told him about the issue and he said take the car to the dealer to check out your DVD player!!! the think is everything else works just fine in the display but the NAV. thank you so much.......

you should check with a dealer with a stock dvd. Yours is a copy perhaps and maybe faulty.