3000km is nothing. I found a significant difference in how the motor felt after 10,000kms and then after 20,000kms. Every oil change felt better and better. The VSA on will not make any difference on the dyno as they are testing in a high gear where traction control will not activate.
The Euro ECU is always adjusting and learning so resetting the ECU can alter the maps but there really isn't much point in doing that if the car is going to adjust it again. And the AFR is not an "issue" for the vehicle - it is normal. That is how the car was designed from the factory to protect the engine and keep it cool. The fact the Euro is running so rich is an indicator that power can be unleashed by taking out some fuel from the mix with ECU tuning.
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