S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

2007 S Class Navigation Problem

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Old Jan 28, 2013 | 08:26 PM
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cdmdriver's Avatar
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2007 S Class Navigation Problem

Recently our S Class Navigation system is showing our "on screen" position as several blocks from our actual position. As we drive, it shows us running through homes, back yards, etc. Anyone have this problem, and a possible fix? Any way to reset the GPS positioning?
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Old Jan 29, 2013 | 06:50 AM
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Fix your GPS antenna or the cable. You might want to test another antenna first, temporarily connected to the rear of the unit.
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Old Jan 30, 2013 | 01:16 AM
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See https://mbworld.org/forums/3074450-post65.html P-B-82.85/512g SEPT08 Intermittently, vehicle shows incorrect position even with more than three satellites visible
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Old Jan 30, 2013 | 11:14 AM
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Thank you for your responses.
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Old Feb 11, 2013 | 06:07 PM
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As a quick update. We took the car into the dealer. They installed the updated software.

Now the cars position shows several cities away.

Does anyone have instructions on how to check the antenna or antenna cable?
I can not find any instructions on this for the S class.

Any assistance would be greatly appreciated.
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Old Feb 12, 2013 | 02:05 AM
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The first thing you could do is read the COMAND manual and set it to display geo-coordinates. If it shows "-" or "0", you would have a better idea on the next step.
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Old Feb 13, 2013 | 01:18 AM
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Originally Posted by Diesel Benz
The first thing you could do is read the COMAND manual and set it to display geo-coordinates. If it shows "-" or "0", you would have a better idea on the next step.
The geo-coordinates display will also show you how many satellites are being tracked. Normal operation requires at least 4, ideally 5 or more. If it reports less than 4, this would be a strong indication of an antenna problem. Make your observations while your vehicle is on an open road with no nearby obstructions such as freeway sound walls or lots of tall buildings.
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