SAT NAV out of sync?

[ally_paul]

Hi there
I have a C180 and the command sat nav system was only replaced about 18 months ago. Suddenly, out of the blue, the sat nav / map are not showing the correct current location. It appears to be out of sync and shows the current location as about 20 miles away from what it should be. Can anyone help?
Thanks

 

[Ellsy Tanners]

It sounds like you have lost the gps signal from the antenna. The most common cause is the antenna going down.

 

[Ellsy Tanners]

You can see by looking how many satalites the car car see on the display. ( the number next to the satailite icon below the map.)

 

[ally_paul]

Thanks for your quick response. I cant see any satellites showing. Do you know where this antenna is located (it is a C180) and how easy it is to replace?
Thanks

 

[Ellsy Tanners]

What year car paul?

 

[ally_paul]

The car is 2004, the unit is COMMAND APS and it was replaced with a new unit in 2007.
Thanks

 

[Ellsy Tanners]

Do you have any thing like this on the roof of your car at the back?

http://www.detali.ru/cat/oem_mb2.as...605716.628&CT=F&cat=69N&SID=82&SGR=345&SGN=19

 

[ally_paul]

Yes I can see what looks like number 40 and number 60.

 

[Ellsy Tanners]

The problem most likely is down to the signal not being received. Get the antenna tested.

 

[ally_paul]

Will do, thanks for your help.