If you are buying or considering purchasing a used Mercedes Benz, it cannot be stressed enough to do your due diligence regarding the car you are buying in order to reveal all potential problems beforehand.  It is amazing how many people want their car inspected after it has been purchased, oftentimes forcing us to break the bad news.  Especially given the current economic environment, I am a firm believer that if an individual owns a good car that has been properly maintained and has very little needed repairs then he (or she) will keep it!  If you are interested in purchasing a used vehicle, please get a CARFAX report and get a reputable, non-biased Mercedes repair facility to do a pre-purchase inspection.  As a repair facility we will perform an inspection for $80, which includes a test drive, full visual and short test via the Mercedes Benz diagnostic system.  Mercedes specialists know what to look for, so you must take it to them!  This can be the best money you will spend, so make arrangements with the seller to do so.  Individual shops want to do the PPO because they have the potential to acquire a new customer.  With the knowledge acquired by you, the potential buyer, a pre-purchase inspection can prove an excellent bargaining chip in negotiating price with the seller.