After refueling, the engine warning light comes on due to a thermal probe error

[Pinello]

Hello everyone, I would like your opinion on what happened to me recently, that is, after refueling with AGIP diesel plus which is a fuel with additives supplied to the pump by an Italian company, while before I always refueled with normal diesel fuel. With the engine cold the next morning after starting it, the amber engine light came on and my mechanic's tester revealed an error in the thermal probe upstream of the turbo. After resetting the error it no longer reappeared. This happened with both the 2015 GLK 220cdi 4matic (X204) and the 2009 S class W221 320cdi. Granted, the first could have been a coincidence, but two out of two I think is a problem. Why did I have this problem with diesel plus refueling? Could any of you give an explanation? Thanks and have a good life.