Tutorial: Mercedes Benz speed limit removal using Topdon Phoenix diagnostic scanners.

Requires Phoenix scanners that support Mercedes SCN coding, including Phoenix Elite/Phoenix Max/ Phoenix Smart/ Phoenix Xlink etc.

Procedure:

Select Engine control unit.
Select Variant coding.

Select the top one and scroll down to VMAX.

Change it to 161km/h, this is the highest it will go with Topdon and write coding.

Come out of the coding menu and go into special functions.
Go into the Teach-in Process and then to Maximum vehicle speed limit, it will now allow you to change it.

This shows the old limit of 120km/h and the top is what we’ve just altered in coding, you can now change them all to 161km/h.

Take a few minutes to do so.

Without doing the coding, Topdon only allows you to change to 120 km/h Max.
Check and make sure it’s aved before you cycle key/start the vehicle.

Topdon disabled Benz speed limit successfully.

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