I got a letter from BMW saying that they would extended my manufactures warranty for a monthly sum as my car is approaching the 3 year old mark. I have 3 different choices with the top level of cover going for £66 per month, next level down costing £55 per month and the cheapest being £44 per month. I am considering doing the £66 per month package but was wondering if its worth doing and if the price is ok. I have an E60 530D M Sport 2006 with 35k on the clock. A friend suggested getting a extended warranty from somewhere else instead of BMW. Is this a wise idea? Will it be as comprehensive as BMWs?