Help!Terrible problems of NTG4 Comand in my w204 C300(c280)
Here come two problems:

1. The car can not recieve the satellite signal. Shown as the photo.The displayed latitude and longitude are totally wrong!

I ran the Circuit Check in Egineering Menu.It shows 'GPS antenna NG', error code 00000100.

What does the code '00000100' mean? Any suggestion about this? I think maybe there is no GPS antenna installed in my car at all? How can I check it? Where is the antenna, in the roof antenna? How the antenna connect to the comand unit head? Which cable or fakra?
Here are more photos from my comand.


2. There is only a euro map, no China Map. I'm thinking that if I can put a China Map, copied from New E-class with NTG4, which have a usable navi in China, into the HDD of mine to make it work? Someone seem to have attempted that, but failed. Should I copy or clone the HDD? Maybe there is a identification code in NTG4, that different car with NTG4 can not share one HDD?
I really need some help...

And your help would do many w204 C class and GLK class owners in China a big favour . It's not fair that we pay for the same NTG4 Comand but can't enjoy the Navi~~~~~~ Thanks! Best regards~~~~~~

Are you sure your car has a GPS antenna installed and connected to the Comand unit? I understand in China you are supposed to use an external navi device (or was it Korea).
Are you sure your car has a GPS antenna installed and connected to the Comand unit? I understand in China you are supposed to use an external navi device (or was it Korea).
By the way, I have sent a message to you, Diesel Benz
Last edited by vikikang; Dec 4, 2009 at 02:40 PM.
Here it is:

Could anyone indicate the certain positon where the Antenna should connect to in the pic? Really appreciate~~~ Thx again
Last edited by vikikang; Dec 5, 2009 at 10:16 AM.

Perhaps you navigation feature was disabled just because of no maps for your region. The W212 DVDs are anyway different from the W204 map DVDs, at least in Europe.
The main function of the gps(minus the traffic alert etc) has no relation to communication systems like the internet. On a GPS you're just locking in satellites and sending no information. The internet isn't "illegal" and actually very commonly used. It's just a bit more controlled by the government with censoring.
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Good luck~~~~

I'm not sure if I can get the info for this car with my on-line account, the antenna on top of the roof may not include GPS if the car did not come with navigation support but since it has the navi capable Comand HW, the roof antenna might as well support GPS. You just have to figure out that, and you can always test with a temporary antenna.
Actually I don't have the VIN for this car, can you send it to me via PM?
Last edited by Diesel Benz; Dec 6, 2009 at 03:49 AM.
I'm not sure if I can get the info for this car with my on-line account, the antenna on top of the roof may not include GPS if the car did not come with navigation support but since it has the navi capable Comand HW, the roof antenna might as well support GPS. You just have to figure out that, and you can always test with a temporary antenna.
Actually I don't have the VIN for this car, can you send it to me via PM?
I am having the exact same problem with my GLK300, so would like to ask for your favor on checking this too.
I'm not sure if I can get the info for this car with my on-line account, the antenna on top of the roof may not include GPS if the car did not come with navigation support but since it has the navi capable Comand HW, the roof antenna might as well support GPS. You just have to figure out that, and you can always test with a temporary antenna.
Actually I don't have the VIN for this car, can you send it to me via PM?
I have tested it with a temporary antenna and the GPS works fine, as the photo.
obviously, there is no GPS antenna connect to the HU.

Another problem : I dont't have a China Map.

Chinese in this pic mean that OUT OF MAP.
Thx to everyone
especially to Diesel BenzNow I'm trying to put a usable China Map , copied from w212 E which have a genuine navi in China, into my head unit. Any suggetion about this? The map data is installed in HDD. Could I just simply copy the China map data to the HDD, inorder to make mine work fine? Maybe it is not so simple?
If the W212 is getting China maps, than the next model of W204 should be getting them as well. Once the new maps are out, they should work on your car.



I think so. But in where the antenna is installed? I think it is in the IC? If anyone know the exact position, plz tell me. Many thanks.


