Cant open back doors! i have a mk2 caddy van and the main bigger door on the left has jammed somehow as i unlocked it with key tonight and its stuck i suppose ive got crawl throught the van from the front and idea of cost/or what part is at fault thanks in advance.. Volkswagen 99 - passanger door won't open. central locking seems fine - the door just wont open from inside or outside. - answered by a verified vw mechanic we use cookies to give you the best possible experience on our website.. Re: vw caddy back door problem post by waxed valeting