What about a short connection the other way around?

I have a flight from Dusseldorf coming in (scheduled) into AMS at 13:25 and my onward flight to Mexico City departs at 14:30, so boarding doors close at 14:15. Does it make sense to get to the airport in time for the earlier flight to AMS (which would leave DUS four hours earlier), or do you think this is still reasonably doable?

At least on two of the last seven days the DUS-AMS flight arrived 30-40 minutes late, which is what got me worried, and in addition I have a condition that prevents me from running (I can normally walk though, just not as fast as I would like). Given the arrival from DUS at a B-gate (or even an outside stand) and the departure to MEX probably from an F-gate, that alone means 25 minutes of walk plus passport check.

Thanks for your opinions!

Greetings - Dirk