NemesisUK

From the handbook

Would this not be on the data label on the driver's door shut? Gross Train Weight - Unladen Weight? Also listed in the owner's handbook in the Specification section.

The interior and exterior illumination on approach to the car can be set independently. I think this is a customisation possible only by the dealer, according to the handbook.

Every Lexus I've had came with a small metal numbered tag, even when they came with two fobs and a key card. There was a note in the pouch (and in the handbook) with the keys saying to keep the tag (key number plate) in a safe place, not in the car. New mechanical keys can be cut with the information on the tag.

That would be my first to check.

Brake fade was a big problem when drum brakes were the norm. As the drums heated up they expand away from the shoes increasing pedal travel. Now with discs the norm heat isn't such an issue and in really heavy use the discs expand toward the pads. Friction material has, as you say, improved massively if at the expense of much more dust and wear.

My Mercedes had these little levers in each headlamp but this simply dropped a little internal shield to mask the beam. One would still need to replace the units for permanent export.

You may find this Lexus EU tech doc interesting but keep in mind it's for the 2020 RX, there may be differences in how your 2017 GS operates. LIGHTING SYSTEM CONTROL ADAPTIVE HIGH-BEAM SYSTEM (AHS).pdf

Do you have adaptive headlights, not simple auto lights? If so the adaptive high beam will change the range dependent on speed. I notice on my RX the high beam range extends significantly at speeds above 60mph but the beam pattern is much broader at lower speeds.

Not round here they're not. Plenty of places advertising them but when one enquires they can't supply and they don't know when or if they'll come back in. Even ATS who are part of the Michelin group can't get stock.

Pretty much as detailed in the owner's handbook, at least in my RC and RX handbooks. Lexus Swindon is my local dealership, they supplied both my RCs and my current RX and they are ace, superb service every time. Nothing seems too much trouble, very accommodating ...

Understood but why did you turn it off?

Why did you "turn the ignition off"?

No Have you checked the tyre pressure?

He should notice the lack of self-levelling and headlamp washers?

Your independent garage is risking it's MoT testing licence and your road legal status/insurance etc.. by ignoring this 'blindingly' obvious statement in the MoT tester's manual - Existing halogen headlamp units on vehicles first used on or after 1 April 1986 must not be converted to be used with high intensity discharge (HID) or light emitting diode (LED) bulbs. If such a conversion has been done, you must fail the headlamp for light source and lamp not compatible. This does not refer to complete replacement headlamp units which may be constructed with HID or LED light sources. If a complete headlamp unit has been replaced with a unit that was manufactured with HID or LED light sources, it must not be failed for ‘Light source and lamp not compatible’ but it must meet all other requirements detailed in section 4 of this manual specific to the type fitted at the time of test.

Tyres are everything, even fancy AWD and summer tyres will get you into trouble. Winter tyres and RWD is totally doable, I drove many snowy miles in my RWD Mercedes without trouble, well if one can get past all the stuck and abandoned cars!

They might prefer to settle privately but wait until they find out how much this is going to cost. Lexus parts aren't cheap! Secondly your insurance T&Cs require you to advise them if you are involved in an accident. If the third party does go through their insurance (once they find out the cost), yours will be made aware irrespective of your preferences. Is the car bought through finance? Then you have to go through Lexus.

You need to adjust the pressures to account for the drop in temperature, don't just wait for the temperatures to increase!

All just to do with the ambient temperature drop. Run-flats are no more susceptible than 'normal' tyres. Just Boyle's Law in action! Inflate the tyres to the recommended pressures before the next journey

'Cold' just means at ambient temperatures i.e. the car hasn't been driven. First thing in the morning is when I tend to check mine, before setting off. Pressures will naturally rise and fall depending on the outside temps, going up in the summer , down in the winter. Which is why one is recommended to check and adjust if required on a weekly basis.

The standard OEM battery won't discharge overnight, unless you have a parasitic drain. You need to find out why it's discharging so quickly or you will simply drain the 'bigger' battery..

Manuals are available to download from the Lexus website. Checkout the section for all the options one can change https://www.lexus.co.uk/owners/about-my-lexus/manuals

Except when they read the codes and see the date stamp for when the fault happened?