Can I use any egs52 TCU in my mercedes?

Answer is possibly depending on vehicle!

There is many different firmware versions that need to match what vehicle you are putting tcu into.  You either buy the correct part number tcu for your car and have it coded to work or you can send us your egs52 and we can flash in correct firmware and coding.

There are around 5 different hardware versions of egs52 ciruit boards from base version to full spec board that are used in Porsche, Ssyangyong, Mercedes, Chrysler.  One style may work fine in your mercedes but not work in porsche that needs analog inputs and that circuitry is missing from the board.