Date registered: Dec 2006
Vehicle: 1999 ML320
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The sensors screw in to the exhaust pipes around the first catalytic converter area of the pipe. You can see one or two of them behind the engine where the exhaust pipe is visible, the other ones are easy to to get to from under the car.
The info on the correct sensor is above, BOSCH 13782. I got mine from Autohausaz. Easy replacement, you'll simply need the correct sized wrench to back them out, might need a little force depending on how long they've been in there, unplug it from the clip that connects to it, put some seize on the new one, screw it in, plug it into the clip. Remove the battery cable for a few seconds, put it back on, and you should be set.
Last edited by Dan P; 04-09-2010 at 08:59 PM.