A l"ittle read"to use your phrase isn't required though.
Your car was fitted with the cooler as standard and Mercedes knew it was being sold in the UK. Why did they do that? (Rhetorical)
A "little read" might help you understand that many lubricants and other fluids have an optimal operating range with regard to temperature and pressure if they are to maintain their correct characteristics without breaking down .
Frankly I don't care. You took a chance, it didn't work out, a pity but thats all there is.
I really cannot be bothered with this anymore or you so the ignore list will be very useful. I doubt that will keep you quiet though.