NemesisUK

I have used Gummi-Pflege for many years, great stuff. Excellent at preventing door seals freezing shut...

Those wires look as if they have been cut and repaired. I would have thought factory loom would have been totally wrapped, why leave joints like that exposed? Second image seems to show a loom terminated after removal or non-fitment of an optional piece of equipment. Didn't think looms were multi-purpose, certainly not in Mercs where even just one wire would be missing if an option wasn't spec'd in the build sheet. Obviously I don't have the 30yrs experience of your auto electrician, so just my first impressions

Is this when the PCS suddenly kicks in??

On most models it's possible to use the ACC (or dynamic radar cruise control) in CSC (constant speed control) mode. By default the ACC system will always be set to the maximum separation distance

Two-piece rotors (aka floating rotors) reduce unsprung weight and improve cooling. this allows the friction surface to be made from different materials (steel, or carbon fibre composite or ceramic) The friction surface is separate from the mounting bell, held by bolts, spring clips etc.. The bell is normally from aluminium. Worth noting, in the RC's case the two-piece rotors cannot be separated and cannot be used with steel rims.

I don't know what the GS is spec'd with but the 2019 RC300h has 356mm two-piece rotors and opposed four piston calipers - OS12WS

Is this a Lexus accessory or a 3rd party after-market offering?

Not only bigger calipers (in a rather pleasing yellow/orange colour) but also bigger 2-piece discs 😎 (rears are the same as pre-facelift, just coloured calipers)

If it's one of the electric motors then the hybrid system would be showing faults. Stop guessing and get the car on Techstream operated by someone who knows what they're doing.

The hybrid battery is what spins the engine to start. Does the hybrid battery have any charge? Really needs to have someone with Techstream to diagnose what's wrong, read off the error codes.

I could see some occasions when it might be useful. Clearly the car recognises the fact it's raining, or does it also ask when it's dry? Does the car ask to close the sunroof when it starts raining? Is there an option in the setup menus to disable the feature?

The RC300h everyday! Smooth, comfortable, responsive and exclusive. The BMW is brash and common..

So the ES transmission is different from that in the RC?

@DanD - Sounds just like my experiences in the RC,almost as if she's trying really hard to be as obtuse as possible!

LC500 Inspiration Series 2020 Great colour combo

1 Press the “MENU” button on the Remote Touch. 2 Select “Setup”. 3 Select “Navigation” on the sub menu. 4 Select “Traffic”. (Page 108 of the Nav handbook)

Also doesn't Lexus have a "self-healing" top coat? Perhaps try gentle heat on a small area a see if the swirls diminish?

The car would have shipped with protective film on the big panels, so nothing to touch them until the dealership does the PDI.

Are the pressures in agreement with those shown on the driver's door pillar? Tyre light will only come on if the tyre pressure(s) drop below the benchmark set in the system. If you are 100% sure the pressures are correct (check when cold not driven for at least 2hrs) you can reset the warning by pressing the reset button in the lower dash panel (quite hard to see) Check your handbook for location and procedure.

The azure blue certainly sparkles in the sunshine 😎

Do you have one-piece or two-piece front discs? If you have the latter be aware one cannot use steel wheels as they may distort the aluminium "top hat" of the disc.

Do you have traffic updates set to On in the Setup-Navigation menus?

So, xenons with auto-levelling

Front discs on my 2019 RC300h are bigger (14.0" versus 13.1" on the one piece disc according to the build sheets) and they are now two-piece (but not possible to separate the friction rotor from the hub/top-hat section) to promote greater air flow and cooling I've not had the need to test out the ultimate stopping power but would imagine the 2019 spec will handle repeated hard stops better than the 2016 spec. Rear discs and calipers appear to be identical to the older spec model, apart from being orange! Also, just read the info that the two-piece (larger rotor) can only be used with alloy wheels. Steel wheels will cause the top-hat section to deform.