How to tell if ECU has software upgrade?
I am the third owner of my '03 CL55. I noticed that in the documentation I got with the vehicle the first owner had the Evosport ECU upgrade. I am wondering, how can I tell if the vehicle still has the ECU upgrade from Evosport or if the dealer has managed to reflash it to stock by some means...?
Is there a relatively simple way to read the data via OBD II connection and determine what's what?



) Does not go past 160mph!
