Battery replacement

I am sorry, I am not following. Car is inside the gate at auction so I just wanted to put in neutral to tow it home, it was towed in the auction because it has the hook in the front bumper. So someone must have had it in neutral when it was towed, and am trying to figure out how. So is what you saying I have to purchase a new battery and install it to put it in neutral? I think one of the problems it has is that even though the battery may be new she wont start. So maybe a starter or another issue, that is why I am trying to find out what benz says about putting it in neutral if it say it breaks down on you and must be towed.

Yes, I know that trick. But that works when the shifter is in between the seats, on this car its in e steering column.

I see, good points. I asked the tow truck to go get it and he didn't put enough effort, my guess is that on these cars maybe the door has to be closed too, I see it on Benz and BMWs, especially when running, but brake switch and enough juice may get it released. I will try tomorrow, it was towed I know that, and maybe dragged onto the flatbed. Yes, I will let you know what I find.

I got it in neutral, can you confirm how many batteries this car have and their location?

I got it inside my home, battery measures 12v, put 2 jumper boxes on it and I hear a click but no starter turning, also, with or without the jumper boxes when I insert the key in the ignition and turn it on there are lights on the dash, even though stronger with the jumper boxes on, but in both cases: after leaving the ignition on for 10 seconds the whole dash goes black as if there is no battery in the car everything shuts off. Then if I turn it off remove the key and insert it it comes back to life, same way every time. There are many codes now related to system voltage low to most components. So cleared most to see but I still only hear a click. What could be sole possibilities to why that happen with the power just completely shuts off? I checked and battery terminals are not loose.

Got it, charged both batteries and now electricals are okay. I added a jumper box to the starting battery, went underneath and hit the starter to see if I get anything, I got more than a click now, but there is no way for me to test the wires on the starter, with a v12 you can barely put an ant through any hole in the engine lol. Is there another way to confirm if its the starter? If am hearing that hard click does that mean the relay is working fine? Also, when I kept trying to start it and it will click, I did 6-7 times then smelled a burning smell went underneath and there was a bit of a smoke around the starter, no spark or anything just some smoke, not sure if it's because I tried so many times. Do you usually hit the starter or the solenoid?

Removed the starter, the wire between the solenoid is fragile. Tried to bench test it nothing, opened it up and smells burned, inside wire also have burned marks, brushes don't look good. It's very tight otherwise would have tried to turn motor at the crankshaft, what if I turn the flywheel would that work or that wouldn't make sense?

Crankshaft usually moves clockwise on all cars correct, if so same for flywheel?

Got it, if I turn the flywheel will I see the crankshaft turning?

Changed the starter, installed it, battery measures 12.3, put a jumper as well, tried and it still does hard click, then smoke after 3 tries or so, battery cables get really warm that fast. I am thinking there is some electrical issue, no way for the cables to get that hot quickly and a smoke to develop.

Put another used battery as I suspect battery has some issue, and a jumper box. She turned extremely slowly, no smoke and the cables aren't hot just normal heat.