Send my ride in for servicing and complained to them about the ringing/vibrating sound from undercarriage. Action taken was to tighten exhaust joint thou honestly I don't know if this is really the problem. Can only keep monitoring and listen out if sound still there.
Btw anyone who wants to send in to TCM for additional works better check and make sure they really did it. Cos I requested for leather care after servicing but when I went to collect the car, it was pretty obvious they did not carry out the job. To think that I even paid up. Immediately look for the SA and he called the people in workshop over and they claimed they overlooked this aspect. This occurred in the Lok Yang center.
Incidentally I changed my belting at 40k but each time I start car in the morning, can hear a screeching sound. Seems like they did not tighten the new belt. Complained about this too and finally they did it. Now I just finish my last free servicing and honestly thinking whether I should continue with TCM or look for other workshop cos I heard that over at Toh Tuck there are a couple of them that are staffed by ex TCM mechanics and charges are cheaper.