Vaneo, Ambiente 1596cc manual, 53 starts intermittently. AA man perplexed did all basic checks, thought it was starter motor until it suddenly started. Local mechanic thinks it is starter motor but not 100%. Ready to take out engine(!) to replace with new starter motor. The car already has an ongoing problem and has been in and out of Merc garage 12 times over two years - the interior light comes on and the doors unlock intermittently and they are unable to fix it. Has anyone had similar problems? Could it be a problem with alarm and immobiliser? HELP!!!