Most accurate way to gauge speed?

What is the most accurate way to measure my speed? Not the speedometer, obviously. But is using the rev counter RPM times the top gear ratio (20.2 mph/1000rpm) in my car a more accurate figure than the...

BMW sat nav won't work?

I bought a BMW X5 and the sat nav keeps asking me to insert disc - what is my system? I don't think the system has worked from new?

Updating an Audi A4 Sat Nav?

I have a Audi A4 with sat nav RNS-E we are going to France for our holidays and I would like to update the system as it is not very good, Audi charge about £250 plus ( I could buy a stand alone sat nav...

Can I update my Mercedes-Benz nav to 7-digit postcodes?

My local Mercedes-Benz franchised dealer in Northampton said manufacturer has not & will not produce a 7-digit capable Sat Nav hardware because this feature is unique to UK & Ireland only and TOO expensive...

Why hasn't Audi installed 7-digit satnav systems into their cars?

Having read numerous tales of woe regarding the performance of the Audi satnav system, I wondered if you have any further information. I'm not looking to purchase a BMW, as I prefer the Audi A4. So if...

I prefer 'map-nav' to sat nav, despite the dulcet tones of my Citigo's Infotainment system.

I took a drive out from Dulwich to Chatham in my new Skoda Citigo (a brilliant little car) using my eyes and road signs to guide the way. On return I used the inbuilt Infotainment System for the first...

Why don't manufacturers fit speed limit warnings as part of satnav systems?

I recently received a Notice of Intended Prosecution from Norfolk Constabulary for exceeding a 30mph speed limit in Norwich by 5mph. I will be allowed to attend a Speed Awareness Course, which I look forward...

Why don't satnav updates show the latest road changes?

I just wanted to alert your readers to the fact that the Garmin SD update card for the Kenwood Sat Nat in Skodas is at least 12 months out of date. I purchased a card for £78 from their website in October...

Hyundai ix35 Satnav road speed indication missing - can you help?

Last May the media unit on my Premium ix35 was 'upgraded', after which the the road speed indication disappeared, a feature I found very useful. It now appears intermittently, mainly on motorways (very...

Sat-nav playing up in the cold...

When I turn on my sat-nav it keeps coming up with a message 'please insert original data carrier'. This only happens when it is cold. It works okay when the weather is above 4 degrees c.