I don't recommend you to spend the money on a ob2 scanner, because its only useful when you have your "check engine light on".. they range from $100 to $8,000 .. When your car does get the check engine light on than you should go out to buy one.. average cost is $200US.. If you want the list of ob2 diagnostic codes for mercedes I can post it if you like, but it doesn't tell you much, if you get the code, post your code here.. than gilly can give you a tip!.. I have a oil suction device if you're interested.. first $50US gets it =)

Steven
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