It may also be some oil from the repairs dropped on some hot parts of the engine and are contributing to the smoke or steam you are seeing. (mechanics.stackexchange.com)
A drive ready message shows in the lower part of the engine rev counter when the start / stop button is pressed and the state of the battery pack shows below the gear display. (nextgreencar.com)
Do you know what part of the engine the knock is coming from (top, bottom, front, rear)? (mechanics.stackexchange.com)