Sure, here is the translation of the text from German to English:
"cu" is a Spanish abbreviation for "con usted," which means "with you." It is often used in online communication to indicate that the sender is available to chat or talk.
Here is an example of how "cu" might be used in a conversation:
Person A: "Hey, I'm bored. Want to chat?"
Person B: "Cu!"
This means that Person B is available to chat with Person A.
"Cu" can also be used to indicate that the sender is thinking about the recipient. For example, if Person A is thinking about Person B, they might send a message that says, "Cu."
In general, "cu" is a friendly and informal way to communicate with someone online.
Just out of curiosity:
What kind of engine are we talking about? The (1.4 and 1.9) TDIs don't have a catalytic converter bypass, but rather an EGR (Exhaust Gas Recirculation) bypass.