Smart key problem
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Joined: May 2016
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E350 Sport
Smart key problem
So yesterday I had an issue turning the car on. First i noticed that the doors didn't unlock right away. So first thing I did was go and buy a new battery for my key. Did that. Still having the same issues.
Here's what happens
I have to press the unlock or lock button several times or hold down until it actually locks/unlocks
Then whole inside the car. I put the key in and turn it. But it acts like there is no key present at all until I play with the remote a bit or press down on the remote. Then it lights up the dash as normal. I have to keep messing with it until the car turns on.
I haven't hooked up a scanner or anything yet. Has anyone got any insight to this issue ????
Here's what happens
I have to press the unlock or lock button several times or hold down until it actually locks/unlocks
Then whole inside the car. I put the key in and turn it. But it acts like there is no key present at all until I play with the remote a bit or press down on the remote. Then it lights up the dash as normal. I have to keep messing with it until the car turns on.
I haven't hooked up a scanner or anything yet. Has anyone got any insight to this issue ????
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If it scanned the other key and sent a "do not recognize" without you having to fumble with it, then I would suspect you have a bad key.
Only a dealer can order you a key and they are not inexpensive. There are no Ebay blanks, etc that can be programmed. It needs to come from the dealer.
Only a dealer can order you a key and they are not inexpensive. There are no Ebay blanks, etc that can be programmed. It needs to come from the dealer.
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Joined: Mar 2011
Posts: 998
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From: VA
W212 E-class, W211 E-class, F10 5-Series
So yesterday I had an issue turning the car on. First i noticed that the doors didn't unlock right away. So first thing I did was go and buy a new battery for my key. Did that. Still having the same issues.
Here's what happens
I have to press the unlock or lock button several times or hold down until it actually locks/unlocks
Then whole inside the car. I put the key in and turn it. But it acts like there is no key present at all until I play with the remote a bit or press down on the remote. Then it lights up the dash as normal. I have to keep messing with it until the car turns on.
I haven't hooked up a scanner or anything yet. Has anyone got any insight to this issue ????
Here's what happens
I have to press the unlock or lock button several times or hold down until it actually locks/unlocks
Then whole inside the car. I put the key in and turn it. But it acts like there is no key present at all until I play with the remote a bit or press down on the remote. Then it lights up the dash as normal. I have to keep messing with it until the car turns on.
I haven't hooked up a scanner or anything yet. Has anyone got any insight to this issue ????
But if it is still under warranty, you may be able to get them to give you another/a working key as a warranty claim.
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Thread Starter
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Joined: May 2016
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E350 Sport
Originally Posted by tresean1
What year is your car? Did you purchase it CPO? Since you only got one key, I suspect not.
But if it is still under warranty, you may be able to get them to give you another/a working key as a warranty claim.
But if it is still under warranty, you may be able to get them to give you another/a working key as a warranty claim.
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Joined: Mar 2014
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From: West Central Florida
2011 E550 P2 4M Sedan
Sounds like what happens when I have my key in the same pocket as my phone. Did you check the battery with a multimeter or other tester? Don't assume it has the proper voltage.
Keep us posted.
Keep us posted.
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E350 Sport
Originally Posted by thefisch
Sounds like what happens when I have my key in the same pocket as my phone. Did you check the battery with a multimeter or other tester? Don't assume it has the proper voltage.
Keep us posted.
Keep us posted.
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From: West Central Florida
2011 E550 P2 4M Sedan
If the battery is at least 3v on the meter, you can also check the contacts in the key itself and bend them to provide better contact in case that's the issue.
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E350 Sport
Originally Posted by thefisch
I saw that, but I've gotten new batteries that didn't have the proper voltage so I'm in the habit of checking them. These keys start flaking when voltage gets even a tad under 3v. Not saying that it's that for sure, just an easy thing to check before you go to dealer.
If the battery is at least 3v on the meter, you can also check the contacts in the key itself and bend them to provide better contact in case that's the issue.
If the battery is at least 3v on the meter, you can also check the contacts in the key itself and bend them to provide better contact in case that's the issue.
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Joined: Dec 2007
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From: Orlando, Florida
E350 Sport/ML350RWD
It sounds crazy (I still don't believe it 100%), but my SA told me to only use Panasonic Batteries. I told him I bought the expensive Energizers and Duracells, so why were they "dying" so quickly? I stocked up on Panasonic's from Amazon.
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From: Charlotte, NC
2014 E350 4M Diamond Silver
atleast you could've asked us on or before may 30th. We have a 100$ off of 200$ or more coupon for servicing. But, if you talk to the SAs nicely, they might consider it as a discount for the 2nd key.
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E350 Sport
Originally Posted by raja777m
atleast you could've asked us on or before may 30th. We have a 100$ off of 200$ or more coupon for servicing. But, if you talk to the SAs nicely, they might consider it as a discount for the 2nd key.
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From: Charlotte, NC
2014 E350 4M Diamond Silver
Thread Starter
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Joined: May 2016
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E350 Sport
Originally Posted by raja777m
I Know, I'm sorry I couldn't save you 100$.
I didn't read all the comments above, so, if you don't have keyless go, the cost is less than 300$ I believe, else 385$ or less than 450 for the other.
I didn't read all the comments above, so, if you don't have keyless go, the cost is less than 300$ I believe, else 385$ or less than 450 for the other.
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From: Charlotte, NC
2014 E350 4M Diamond Silver
I believe so, because before buying my current one, I looked at other vehicles and it was missing a key. When I asked the dealer for a quote for the replacement and he mentioned that price. I assume everything is included.
Also, first have them tested, may be it is a normal fix..!
Also, first have them tested, may be it is a normal fix..!
Thread Starter
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E350 Sport
Originally Posted by raja777m
I believe so, because before buying my current one, I looked at other vehicles and it was missing a key. When I asked the dealer for a quote for the replacement and he mentioned that price. I assume everything is included.
Also, first have them tested, may be it is a normal fix..!
Also, first have them tested, may be it is a normal fix..!
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From: Charlotte, NC
2014 E350 4M Diamond Silver
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From: VA
W212 E-class, W211 E-class, F10 5-Series
I believe some are CR2025 and some are CR2023, etc. I would verify you installed not only a certain brand, but a certain model/type.
That could possibly have something to do with it.
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E350 Sport
Originally Posted by tresean1
OP, this also sounds crazy...but did you buy the correct battery?
I believe some are CR2025 and some are CR2023, etc. I would verify you installed not only a certain brand, but a certain model/type.
That could possibly have something to do with it.
I believe some are CR2025 and some are CR2023, etc. I would verify you installed not only a certain brand, but a certain model/type.
That could possibly have something to do with it.
