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Is it ok to jump-start a modern car?

Merry Christmas to all!

Someone just said to me something I'd never heard before that you should never use jump leads on a modern car as it will fry the electrics/electronics. The first item turned up on a Google search seemed to confirm. I'm writing it to draw more people's attention to it because I doubt many are aware and also to ask do you have any recommendations as to what to do if your battery is flat. Is the donor car susceptible to damage? What is the situation if you use a battery power pack?

Finally I hope you all have a prosperous New Year

Cheers Philip

Should I keep my BMW X5's mileage down?

Hi,

I have a January 2015 BMW X5 25d bought new with now 70,000km on it. I had planned to keep it four years, but at the rate I am putting up the kms I am worried dealers will tell me it has too high a mileage at probably 150,000km to be worth much on trade. I know some main dealers don't like higher mileage premium stock. Would I be better if I was going for something similar to trade in when the car is relatively younger or do you think it won't make much difference?

Any ideas what's wrong with my Passat?

Hey.

I have a Volkswagen Passat 1.4 TSI petrol. The engine light keeps coming on and there is a rattling in the engine, but four out of five mechanics tell me it's not the timing chain. However, not one knows were the noise is coming from. Faults that keep showing up are camshaft sensor, coils misfiring and fuel sensor. It's keeps losing power.

Any ideas?