On 06/04/2026 at 22:40, Robbo12 said:

Just another question does anyone use a memory saver when disconnecting their car battery to save losing settings such as clock and radio settings if so what type do you use ? I know my cigarette lighter is not permanently live when the ignition is off. And is it wise to connect power to the ODB port without causing ang damage.

The one in the boot is permanent live.

I should add I know this to be true, as I used it to trickle charge the 280 during Covid, and kept the battery In perfect condition in the Superb MKI which sat in the garden for three years before we sold it.

13 hours ago, Robbo12 said:

Update, changed my battery today with no problems. i registered the new battery with mu icarsoft Vaws 3.0 , i started by turning off radio and heater. after reconnecting the new battery i didn't lose any radio presets, only thing i lost was the trip meter. also after turning steering wheel fully to left and right cleared any warning lights on dash.

Taken it for a drive and all seems well apart from the STOP/START doesn't seem to be working properly at the moment, but been told it can take a while for the ECU to learn a new battery has been fitted. Anyone else came across that ?

Would like to thank you all for the information you have given me.

Good news with a little perhaps odd news, and a note for future.

Unless the drive you took the car on was a very short one the stop/start should work when it's supposed to, there are many conditions where it doesn't operate and that is normal.

Lets start with the easy stuff -

• check the new data you have entered on the scan tool is correct, no fat-finger or other mistakes

• make sure all electric items that can be turned off are turned off

• start the engine, briefly turn on the air-con, blower on full, headlights on, hazards on, turn steering wheel to full lock both ways then back to centre - then turn off all those you turned on that aren't required, go for a drive enough to get the engine warmed up.

See if that sorts things and report back.

Note. -

14 hours ago, Robbo12 said:

i started by turning off radio and heater

Up to you what you do, but why were these on, all electric items that are not required should be turned off before turning the engine off. No electric items that are not required should be turned on until the engine is running. This not only saves the battery it also mean you can hear the car and engine bay for any strange noises (smells, vibrations) before you drive off and after you have finished your journey without distractions and noise pollution.

If you don't already do so, best is to get in the car, turn the ignition on, but don't start the engine, and both whilst putting your seatbelt on check all the warning lights that should both briefly light up and go out as they should, and look, listen (feel, smell) for anything different, this only takes a number of seconds. Start the engine check all dials, gauges and warning lights on dash, and look, listen (feel, smell) for anything different this only takes seconds. Then you can fart about with TwatNav, entertainments and comforts as much as you like before prepare to drive off safely. HTH.

3 hours ago, nta16 said:

Good news with a little perhaps odd news, and a note for future.

Unless the drive you took the car on was a very short one the stop/start should work when it's supposed to, there are many conditions where it doesn't operate and that is normal.

Lets start with the easy stuff -

• check the new data you have entered on the scan tool is correct, no fat-finger or other mistakes

• make sure all electric items that can be turned off are turned off

• start the engine, briefly turn on the air-con, blower on full, headlights on, hazards on, turn steering wheel to full lock both ways then back to centre - then turn off all those you turned on that aren't required, go for a drive enough to get the engine warmed up.

See if that sorts things and report back.

Note. -

Up to you what you do, but why were these on, all electric items that are not required should be turned off before turning the engine off. No electric items that are not required should be turned on until the engine is running. This not only saves the battery it also mean you can hear the car and engine bay for any strange noises (smells, vibrations) before you drive off and after you have finished your journey without distractions and noise pollution.

If you don't already do so, best is to get in the car, turn the ignition on, but don't start the engine, and both whilst putting your seatbelt on check all the warning lights that should both briefly light up and go out as they should, and look, listen (feel, smell) for anything different, this only takes a number of seconds. Start the engine check all dials, gauges and warning lights on dash, and look, listen (feel, smell) for anything different this only takes seconds. Then you can fart about with TwatNav, entertainments and comforts as much as you like before prepare to drive off safely. HTH.

3 hours ago, nta16 said:

Good news with a little perhaps odd news, and a note for future.

Unless the drive you took the car on was a very short one the stop/start should work when it's supposed to, there are many conditions where it doesn't operate and that is normal.

Lets start with the easy stuff -

• check the new data you have entered on the scan tool is correct, no fat-finger or other mistakes

• make sure all electric items that can be turned off are turned off

• start the engine, briefly turn on the air-con, blower on full, headlights on, hazards on, turn steering wheel to full lock both ways then back to centre - then turn off all those you turned on that aren't required, go for a drive enough to get the engine warmed up.

See if that sorts things and report back.

Note. -

Up to you what you do, but why were these on, all electric items that are not required should be turned off before turning the engine off. No electric items that are not required should be turned on until the engine is running. This not only saves the battery it also mean you can hear the car and engine bay for any strange noises (smells, vibrations) before you drive off and after you have finished your journey without distractions and noise pollution.

If you don't already do so, best is to get in the car, turn the ignition on, but don't start the engine, and both whilst putting your seatbelt on check all the warning lights that should both briefly light up and go out as they should, and look, listen (feel, smell) for anything different, this only takes a number of seconds. Start the engine check all dials, gauges and warning lights on dash, and look, listen (feel, smell) for anything different this only takes seconds. Then you can fart about with TwatNav, entertainments and comforts as much as you like before prepare to drive off safely. HTH.

Thank You for all the information it has been very helpful, Stop/Start is now working fine after taking it for a longer run. Perhaps the ECU had to learn that a new battery had been fitted. all working great now 👍

1 hour ago, Robbo12 said:

Thank You for all the information it has been very helpful, Stop/Start is now working fine after taking it for a longer run. Perhaps the ECU had to learn that a new battery had been fitted. all working great now 👍

Great news.

It should have been fine straight off if you 'coded' the battery in with the scan tool and also used the scan tool to delete error codes, subject to the conditions being meet to for stop/start normal operation.

My concern was that perhaps you might have a counterfeit scan tool if you didn't buy it from a reliable source.

Always update the scan tool before you use it on a vehicle (and check the batteries for car, and if appropriate scan tools are in a reasonable state of charge to cover all the time and fully complete anything you might be using the tool for (particularly if updating anything on the car).

48 minutes ago, nta16 said:

Great news.

It should have been fine straight off if you 'coded' the battery in with the scan tool and also used the scan tool to delete error codes, subject to the conditions being meet to for stop/start normal operation.

My concern was that perhaps you might have a counterfeit scan tool if you didn't buy it from a reliable source.

Always update the scan tool before you use it on a vehicle (and check the batteries for car, and if appropriate scan tools are in a reasonable state of charge to cover all the time and fully complete anything you might be using the tool for (particularly if updating anything on the car).

This is the tool i used icarsoft vaws 3.0 - Google Search

I got it from Diagnostic World and done the updates on it, I was just unsure to start wit as i didn't want to start something i couldn't get out of. When i first finished putting the new battery in the stop/ Start only worked when i put the car into park position, after a short drive it worked properly. Thanks again everyone always get useful information.

https://www.icarsoft.eu/iCarsoft-VAWS-V3.0

https://www.diagnostic-world.com/pages/more_information__icarsoft_vaws_v30_enhanced_2026_version__vw_audi_seat_skoda_bentley__lamborghini_multi_systemfunction_obd2_diagnostic_reset__coding_tool__official_icarsoft_product_275567.cfm