PetrolDave

On your previous Mk3 Octavia there was a simple VCDS/OBDeleven coding change to enable auto DST change - I've done it on both my Mk3 Octavias.

Read the thread about updating to 1941 firmware...

Toyota Aygo mark 2? Simple to drive and maintain and reliable.

Older cars used fixed vane compressors and a clutch - so the compressor was either off or fully on - but for several years cars have used variable vane compressors which only use as much energy as needed. In my book that's a significant move on in technology, and fuel saving.

Continual random rebooting.

Low Rolling Resistance is achieved by a harder compound which has less grip. Personally I studiously avoid any tyre labelled as "eco" because I'd rather have grip and protect my life and property.

I think it's the first place to check.

The key word there is option, that's the price DIFFERENCE between the base spec radio and the Columbus upgrade not the full price of the Columbus - so many people make this mistake.

Look at the serial number on the cable, maybe even post it here (Ross-Tech will ask you to do that).

AFAIK Skoda don't publish the speed of the Diagnostic CAN bus, you'll have to use the trial and error method.

My 2016 Octavia stays in ECO or D mode as I select using the Individual Mode option.

The CAN bus speed depends on which of the CAN busses you mean - there are many e.g. Powertrain CAN, Infotainment CAN, Comfort CAN, Extended CAN, ... What do you mean by DBC file?

Please share ...

Diesel glow plugs not turning on? Checked the fuses etc?

Be aware that as you have a 2015 model it's a MIB1 Amundsen and that the latest maps available are 2020 maps - no newer ones will be available.

Folding mirrors were only standard on some models and years.

We know you have a 2017 Octavia, but not what engine it has???

Checked the relevant fuse? If that's OK then as said I suspect the water may have caused the motor to rust internally and fail.

The washer supply runs through the motor and it's not unknown for this to cause the motor to fail - I had it happen on my previous car.

My understanding is that VAG consider anything less than a litre every 1000 miles to be "normal". That's what was said to many other owners of my previous car (an RS4) when they complained of a litre every 2000 miles or so.

The suffix letter is the version number, generally the higher the letter the newer it is. There are at least 4 sellers of the G version, take your pick...

.. or a hair dryer?

That's what I normally do, but I also like 'belt & braces' so I have 2 Skoda SD cards!

The navigation database part number 5E0051236E is for a MIB1 Amunsen map database on an SD card - you should find this SD card in one of the SD card slots in the glovebox unit. With an Amundsen you must use a genuine SD/VW SD card as they have a special 'CID' so any other SD card won't be recognised as a map database. Another SD card is easy to find at much less than the dealer price, just search on an auction site for the part number 5E0051236 and get the latest one (there's currently a G version on eBay).

... and make sure to request that they activate Android Auto too.