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The Data Link Connector (DLC) is located in the dash at right side of ashtray. You need to remove the ashtray and slide the access panel to the left. The connector is hidden behind it.

It's kinda nifty how they hid it, but it can REALLY be a pain to find out on your own...

Hope this helps!

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Q: Where is the diagnostic port located on a 98 Jetta?
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