Thanks Zap fizzle. I guess one way round this would be to purchase a car from someone like R Symons and take a test drive to check max range and power, but I guess then I'd be losing out on the Tesla 4 year warranty (but at least I would retain the supercharging).
Personally - I have a Model S which has been quite unreliable, and while not financially a stretch to own, I would find the experience spoiled entirely by multiple £1000+ repair bills pa. Whereas, oddly, I find the car's rattling and unreliability comic, and unstressful. So, warranty is HIGHLY important to me. There are owners who have had cars for several years with no significant problems, however, so it is absolutely a lottery. I accept that it is irrational to pay £8k more for a car with warranty when the expected value of claims over its lifetime is £4k [numbers pulled from my arse, no supporting data] and the company backing the warranty is financially unstable, but that's where I am.
I would take the warranty over the free supercharging. The ONLY used Tesla I would buy, would be one with lots of "proper" warranty left - either manufacturer new, CPO, or *perhaps* the Allianz extended warranty product (but even this has exclusions which trouble me).
If my finance were to be at the "return car to finance company" half-way point tomorrow, the way I'd handle the purchase of another CPO car is this (it's a bit of a cut+paste job from a post in another place):
0 - Purchase Scan My Tesla, the CAN bus cable, an Android handset on which to run it, and the bluetooth dongle, if not already owned.
1 - Wait for a likely car to appear on the CPO list at a suitable price.
2 - Unless there is a choice of suitable cars [right now there are 37 CPO on offer, perhaps the highest ever number? but for long periods in the past there have been very few] immediately put down the deposit on the car online, preventing it being sold to someone else from under me.
This is from experience - my first CPO purchase failed because the car was sold out from under me while fannying around asking/answering questions about it.
I think it's unlikely that you'd be able to get the miles at 100%, raw available kWh at 100%, and battery revision/part number, disclosed to you via the offshore/automated CPO process, and these are much more important than a bit of seat wear or dents-away cosmetic paint fix the car might have.
3 - At delivery, be prepared to reject the car. Have transport home in place. Manage your emotions. Take a friend to help. Inspect on both cosmetic condition, battery part number/revision, *and CAN bus data* from Scan My Tesla. Tesla have fiddled with the reported mileage numbers on the displays to hide degradation of 90 packs, but not yet AFAIK with the "available kWh at 100%" number the BMS reports on CAN bus.
I would not reject for:
Interior carpet damage (not that hard to change)
Seat wear (leather repair people work miracles for not much money)
Scratches/small dents & dings on flat metalwork (it's going to get more as it's used, paint isn't that expensive)
Wheel damage (alloy refurbishment is cheap and I'm going to kerb them anyway)
Rust/rot/crud on tailgate struts, brake callipers, wheels, frunk latch, behind dash (they all have this)
I would consider rejecting for:
Corrosion of actual frunk bodywork (look at it from underneath while open, if it's bubbling around the latch you need to get in writing that they will fix, or reject it)
Evidence of damage to bodywork from wiper misalignment (they work loose and rub on the frunk, eroding it) unless they will commit in writing to fix it
Any promise whatsoever to fix a 'showstopper' issue which isn't given in writing or recorded on video
Any software-locked feature (AP/FSD) declared as present but missing - yes, they will fix, but once you've paid you'll be bottom of their list of priorities
Any issues with getting the car added to your account and available in the app - again, yes, they will fix eventually, but it's taking people several weeks so don't inflict it on yourself
Being a 75 or 90 with an early revision pack (part number on pack visible by lying down next to drivers door) - you'll have to DYOR about the characteristics of each revision
Having undue degradation (CAN bus / Scan My Tesla) - have a number in mind below which you'll reject BEFORE you go for delivery, DYOR
100% voltage being under 4.2V/400V (85 packs, batterygate - CAN bus - may not be apparent at delivery - but should be apparent from
degradation figure)
Having more than 50% of its lifetime charging done by DC (CAN bus again, batterygate, possible future restrictions). If you're planning to supercharge a lot - eg Uber/limo - then you probably want one that's hardly supercharged at all. If you'll never supercharge then you might relax a bit on this. Tesla have repeatedly, over the years, imposed restrictions on cars which have DC charged a lot and you don't want to take a risk on what and when the next restrictions are
Headliner staining or damage (difficult replacement, windscreen out)
MCU or IC yellow ring (they're refusing to fix this at the moment and the "in place" UV light "fix" appears to be temporary)
Any rattles suggestive of debris inside HVAC system (potentially expensive to resolve, not apparent until driven)
Capped charge rate on 90 pack from "excessive" DC charging (not apparent until supercharged) - I'm unsure which pack revisions suffer this but some 90 owners are now seeing 140kW+ rates, so being capped to 96 would be irritating
HVAC doesn't quickly blow properly cold on LO and hot on HI (yes they will fix but arguing with them 'it's not really cold' is tedious)