Hi all: thanks for all your reply ~ it happens again this saturday, and called NRMA and they found the battery were empty, need to be replaced, bloody saturday afternoon, only 1 place still open, and charged me $165 AUD for it, i think it was a rip off. but as soon as i replaced it, i could really feel the different before and after. all good all good. close to 76, 000 kms service, someone told me spark plugs will need to replace, dunno, i think i spent a bit too much on the car already!