Hello, until you become a full member and have access to the technical manual, have a look on line, there is plenty of information and videos to be found
The VIN plate details and location can be found on this link, i think the location of the number depends on the age of the car. The same company also has details of the paint code plate on their website
https://palmbeachclassics.com/vehicle-identification-number-vin/#:~:text=The%2014-digit%20VIN%20consists%20of%20the%20following%20elements%3A,case%20the%20%E2%80%9CPagoda%E2%80%9D-SL%20produced%20from%201963%20to%201971.
https://palmbeachclassics.com/body-and-paint-number-plate/#:~:text=If%20a%20W113%20was%20delivered%20without%20the%20optional,softtop%20folded%29.%20The%20possible%20codes%20are%20as%20follows%3AAlso a link to a buyers guide. I think the VIN you mention indicates a 250SL, which was only made for around a year in 1967, before the 280SL was released, does this sound correct to you based on the V5?
https://motoringinvestments.com/mercedes-280sl-w113-buyers-guide/It's easy to get hung up on the originality of a car, you'll probably see differences on the car you're looking at, to others on this site and on the guide above, to the point where you just get overwhelmed. I guess you need to decide whether you want a car to use, to show, or as an investment, as this will affect the price and how long it takes to find the right car, if you ever do
The other problem is there are not that many cars you can compare, the SL shop probably has the largest selection in the UK, but it may not seem right to look at cars you don't intend to buy, unless you ask them first and explain your position
Unfortunately you missed a gathering in London today, which would have been really useful for you to see a selection of cars, the owners would be only too pleased to help and advise you. There are regular meets in the UK and across the world, if you click on "events" in the main page index, you'll see some from the past and maybe some planned for the future
I'm guessing the car you're interested in isn't cheap, no decent Pagoda is, so the last thing you want to do is rush in without considering all of the options
I'm in Essex and would happily show you around my car if it helps, although i'm no expert, i have picked up a mountain of information on this site and through googling other cars