A durametric gives you lots more information than a OCDB reader. While it doesn't tell you exactly what part(s) to replace, it narrows down the possibilities a whole lot in many cases. If it allowed you to actuate more individual components, for example in the central locking system, it would be even better. Even with this wish for more functionality, a durametric is well worth the money. In fact, it pays for itself if it saves you a couple of hours paying a dealer to diagnose a problem.
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