I've got a mk3 astra, got in it this morning and couldn't do up my seat belt ( wouldn't click ). Looked down at the bit with the red button on it and on the side a yellow tag has appeared with a red triangle on it. Has this got something to do with the belt tensioner ( spring loaded ), can it be reset ? do i need to get another seat with tensioner on it ? or just get a tensioner from a scrapy ?