Syphon's 2024/25 CUPRA Leon 2.0 TSI 300PS VZ3 Taiga Grey

[Tell]

It's pretty close to the battery in that picture, just that bar. Probably back EMF and all that why they have it connected to the chassis and not directly to the battery. Normally you put on the battery. With all the electronics in the car they are going for the straight earth. Let the physics people contemplate that piece of metal .

 

[Seriously?]

It's pretty close to the battery in that picture, just that bar. Probably back EMF and all that why they have it connected to the chassis and not directly to the battery. Normally you put on the battery. With all the electronics in the car they are going for the straight earth. Let the physics people contemplate that piece of metal .

Both my current and previous cars had specific +tive and -tive charging/jump start terminals under the bonnet; but then they both had the battery hidden away in the depths of the boot.

 

[Tell]

Both my current and previous cars had specific +tive and -tive charging/jump start terminals under the bonnet; but then they both had the battery hidden away in the depths of the boot.

I hear moans about non serviceable battery access from a classic car owner... they were flabbergasted that they could not change the battery themselves on a Mercedes.

That earth point on yours will be the text book one to use where it goes onto the chassis. Years gone by I'd just put them on the battery terminals. Positive first, then negative.. whatever the manual says. But with the level of electronics in cars now I tend to think best to avoid where possible.

I've got stop start neutralised so all the restarts don't tax the battery. You can't neutralise the stop start on recent models via coding. Having the memory to turn it manually off is tricky and can be quite dangerous on an automatic when the engine is off and you expect it to be on, on roundabout get aways. People do steering wheel tricks to keep the engine running. All a bit bizarre.

The hybrid people have to ensure that they have the petrol engine running enough to keep the 12v battery charged....

 

[Seriously?]

On my 3 Series Touring you need to have Action Man sized hands to squeeze in to undo the hold down plate and abs like Vin Diesel to wrestle the battery from it's hidey-hole behind the boot side trim and below floor level.

 

[Rob66]

Thanks so much for taking the time to help. That negative charge point position is very helpful. Batteries in cars are odd. Some cars say to clip positive and negative in the usual way (positive to red terminal and negative to black terminal). However some batteries won’t charge if you do this. My wife’s Toyota for example. Some cars recommend clipping the negative to metalwork somewhere in the engine bay. However they never specify where. So your picture is dead helpful.

Will let you know how I get on

Thats great info. If you have a CTEK Charger you can get an adapter that allows you to charge the battery via the 12v 'cigarette' lighter socket. This is what I use on my Boxster as its near impossible to get to the battery. Hope you get the issue resolved.