Hi Rajan, I have noticed the total KMs done reading blinking some times on my Punto 90HP (only recently) and did not see/notice any issue as such because of it. I have been on long trips (more than 1000 KMs) and driven close to 3K Kms after noticing this and have not felt/noticed any issue because of this. Regarding the bottom scraping if its a normal scrape and not a thud/bang of the bottom i dont think there is a need to worry about it, though my Punto 90 HP havent scraped any speed breakers thanks to its increased ground clearance. However i would suggest a visual inspection to see if there is any serious impact. The engine compartment is anyways protect by a protection plate (at least i see it in my Punto 90HP). I am not sure of the rattling noice that you mentioned. FYI, this is my personal experience and am not an expert about automobiles (this is my First car, although have been noticing and discussing about cars of friends etc) Expert members comment and shed some light on this please.