Used VVDI MB V5.0.3 for renew ECU successfully before, but today get error “connecting to unit…failed”. What’s the matter?
Xhorse Engineer solution:
Please take a picture of VVDI MB software error; and a picture of the engine number.
Here you can see the error images:
After seeing the above images, engineer share the correct wiring diagram to follow:
Let us look forward to the good news of this user.
Good luck to him.