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Your oil service light is on in your
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Mercedes E320 and you just want it gone
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without paying the dealer. That's what
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we're going to tackle today. I'm Tom
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from Car Justify and I've helped a ton
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of folks reset these lights right in
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their own driveway. So, don't worry,
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it's easier than it sounds. First thing,
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hop in and close the driver door. Make
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sure the keys in position one or two.
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That's when your dash lights come on,
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but the engine's not running. A lot of
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people ask me which position is right.
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And honestly, most E320s are picky, so I
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like to start with position one and try
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both if needed. Now, you'll see the
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mileage screen. This is where the magic
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happens. You're going to press the reset
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button on the cluster. It's that little
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sticker button on the left. Hold it for
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about 3 seconds until you see the
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service menu pop up. Don't just jab it
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once and expect a miracle. This one
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trips people up all the time. Once
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you're in the service menu, you should
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see something like service A or service
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B or just service do. Now you'll press
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and hold the reset button again. Count
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to three or four slowly. I always say
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it's like a handshake. Don't rush it or
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it won't work. If your car's stubborn,
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turn the key back to off and try again.
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Seriously, I've seen this a 100 times.
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Even my buddy's E320 last week made him
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do it twice before it cleared. These
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merks can be a little finicky with
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timing. Now, let's talk about why this
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doesn't work sometimes. First, wrong key
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position. If you go straight to ignition
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2 too quickly, the dash won't accept the
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reset. Second, battery voltage. If your
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battery is weak, the electronics can
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glitch. I always tell people, if your
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battery is dying, fix that first or
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you'll be chasing your tail. Another
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thing, if you're getting a cannot reset
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message, that's the car's way of saying
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you're overdue by a lot or the service
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interval is set incorrectly in the ECU.
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That's dealer territory technically, but
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you can try clearing codes with an OBD
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scanner that supports Mercedes resets.
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Some cheaper scanners won't do it, so
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make sure yours says Mercedes
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compatible. And don't forget, if you've
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done your own oil change, double check
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you use the right oil spec. Mercedes can
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be picky. I had a guy once use generic
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1030 and the sensor freaked out because
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the viscosity wasn't right. Always check
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your manual. Trust me, it saves
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headaches. So, just to recap, get in,
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key to position one or two, use the dash
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reset button to enter the service menu,
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hold it to confirm, and repeat if it
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doesn't take. Check your battery if
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you're getting weird errors. And if all
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else fails, you might need an OBD
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scanner or dealer reset. That's it.
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You've just saved yourself a trip to the
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shop and a chunk of cash. If this helped
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you out, don't forget to like and
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subscribe to Car Justify for more easy
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DIY fixes. And hey, if you're stuck or
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want me to cover another topic, drop it
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in the comments. I'm always around to
