Is my satellite navigation system more accurate at calculating speed than my speedometer?

I have noticed that my TomTom satnav always seems to show a speed two to three mph less than that registered by the cars speedometer. I use it in two different cars and the difference is approximately...

Where can I get a manual for my Ford Focus RS's satellite navigation system?

I have bought a Ford Focus RS and I did not get a manual for the navigation system. I need to know how to adjust the volume of the voice so I can hear her?

Will the new HTC Desire smartphone work in my 2009 BMW 325 saloon?

Does anyone know if the new HTC Desire phone will work fully in an April 2009 latest model BMW 325 saloon with the professional satellite navigation / connected drive unit installed?

Do speedometers overstate speed and therefore artificially increase mileage?

I recently had my satellite navigation on and noticed that at 70mph on the speedo, the Sat Nav reckoned actual speed was 65mph. I know that speedos must not understate speed and it is not uncommon for...

I can't open my Honda CR-V's satellite navigation system - any ideas?

The joystick/enter button on my satellite navigation works sometimes and not others. I have tried removing the four screws on the back of the lid but the cover still remains tight. Are there any more screws...

Will satellite navigation systems not be updated from the end of 2010?

I have heard that at the end of this year we will have problems with satellite navigation systems not being updated by the USA - is this true?

Does my BMW 320D's sat nav require a software update?

I have just purchased a secondhand BMW 320D with a business satellite navigation system. The company kept the navigation disc. I have purchased a disc, but it keeps saying 'Media unable to be read'. I...

Where can I have my Bentley Continental GT's satellite navigation upgraded?

I am really pleased with my Bentley Continental GT, but sadly the satellite navigation is poor, even compared to a basic Tom Tom. Please could you suggest companies that can help with an upgrade?

Raised expectation

We're in our late 60s and not getting any more nimble. My 05 E46 BMW 320d Touring with 40k miles on the clock has always been dealer-serviced since new. We both find it less easy to get into such a low-slung...

Street cred

We recently moved home. Our new street looks like a single road, but it is actually two roads joined together, end to end. We are experiencing a massive problem as everyone who comes to visit, collect...