A couple months ago, a guy approached me as I walked out of Lowe’s. At first, I thought it was panhandling, but he asked if I could give him a jumpstart. I was driving my Mercedes S 600.
That car has a 200 amp, water cooled, alternator, and H8 AGM battery and about 34 computers in the network. Every one of those computer modules is known to be voltage sensitive. Worse, they are no longer available, and troubleshooting them is actually quite difficult.
There is no way that I would ever hook all that up to an unknown electrical system. That’s asking for trouble - thousands of dollars in damage with an over or undervoltage spike, as well as dozens of hours of troubleshooting headaches.
No thanks.
I replied, “I’ve got a really good jump pack, let’s give it a try.” The Noco GB70* worked great on his 20+ year old Camry. He was started up and on his way.
*The GB70 is a relatively large capacity one I keep in that car. If the S600 needs a jump, that big H8 AGM, and V-12 starter, is going to take some juice to get going.