Hello, I would like to encourage a small discussion round around the two Top Z4 models. What does that mean? Is a 3.0Si option for the base price of the Mz4 the better choice? What about the driving dynamic differences really? What do you say about the brakes (unfortunately they are explained very sparsely in the documents). What do you think about the Tema Runflat in the 3.0, no in the MZ4. Are there only the free masses or are there other reasons against RunFlat in the Mz4? t now in the Mz4 another hydraulic steering better than the electromechanical? And many other questions. I would be pleased about a lively participation Z4 Greetings Stefan