Thanks for the info, I will consider. So far, there is sound at 20 & 40kmph while moving off, still unable to solve. I was wondering, if bring back for them to resolve it. With the feedback, it may not be wise, as their service for non- warranty latio, may not be as good as those under warranty. Maybe is because, they can charge us for diagnosis or they know, we cannot bang table.
Dario, spark plug, I read is only labour.
KT is right, I can't see them what they do to my car! Scary, whether they do a proper job. So far, anyone see how they service our car? Or can we go up together with them to see?