OBD II is a system that has been installed in most 1996 and later cars and light trucks, intended to inform the driver of problems in the components that control the engine and transmission. The primary reason OBD II was invented is to reduce smog emissions caused by malfunctions, but it is also valuable as an alert to the driver that something is wrong…something that can affect gas mileage and drivability, or actually cause further damage to the vehicle.
Two all black Mercedes smog checked at JUST SMOGS®. Most newer Mercedes cannot be dyno tested because the traction control system is not completely dis-engagable. If you’re a Benz owner, make sure you watch the smog technician while he’s inspecting your vehicle…If you see the wheels spinning…stop the test immediately. Otherwise you might be spending big bucks on repairs.