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post #31 of 42 (permalink) Old 05-28-2015, 12:53 PM
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OK I'll try it when I get home. Please tell me what to buy. I'll stop my auto zone on the way home. So basically their is no one that can repair Mercedes fobs?
I can't say that for sure. But why worry about repair when yours may be recoverable.

Please complete your profile, too, or at least tell us what car you have. There are a few diys on taking the keys apart but it varies. And you DO need to take it apart.

I don't know if autozone will carry the spray, you might need to go to an electronics store like Frys. You want aerosol electrical contact cleaner spray, non-residue type. Here's one by WD-40: http://www.amazon.com/WD-40-Specialist-Electrical-Contact-Cleaner/dp/B00CMT9TFY
And regardless whether you recover this key, buy another one. There is no rational reason not to have a spare, that's why the cars come with them. Shop around since dealer prices vary. But if you lose your key or it is damaged beyond repair, you're really going to be in a world of hurt, as you won't even be able to drive it to the dealer and it will be parked wherever until you get a new key.

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post #32 of 42 (permalink) Old 05-28-2015, 12:55 PM
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OK thanks. I'm on my phone and the mobile app and I don't see away to update my profile
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post #33 of 42 (permalink) Old 05-28-2015, 01:08 PM
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OK thanks. I'm on my phone and the mobile app and I don't see away to update my profile
The mobile app is ... well, it rhymes with app.

But you could at least tell us what car, you know?

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post #34 of 42 (permalink) Old 05-28-2015, 01:12 PM
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I have a 1998 E430 sport
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post #35 of 42 (permalink) Old 05-28-2015, 06:09 PM
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I have a 1998 E430 sport
If you drop into the W210 forum you'll find some stickies at the top and there you will find instructions on how to take your key apart.

Let it air dry after you blast it thoroughly with the contact spray (home depot may be an option for that too). Use an eraser to clean the battery contacts on the PCB before you reassemble.

Good luck.

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post #36 of 42 (permalink) Old 05-28-2015, 06:14 PM
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OK I get off soon, I'll run to home Depot or Lowe's. Someone told me to use alcohol and submerge the board in the alcohol but they also said if I had push buttons, it's to late. I like your ideal better.
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post #37 of 42 (permalink) Old 05-28-2015, 06:18 PM
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OK I get off soon, I'll run to home Depot or Lowe's. Someone told me to use alcohol and submerge the board in the alcohol but they also said if I had push buttons, it's to late. I like your ideal better.
Alcohol ain't gonna do it.

They make electrical contact/cleaner spray for a reason. And this is one of them. Exactly one of them.

You're already in trouble. Don't compound it by trying another tack.

And there are soldered-in-place buttons on the PCB (they correspond to the buttons on the fob). The cleaner spray should work there, too. As I said, use it liberally. Oh, and wear a mask and goggles, you don't want it getting in your eyes, nose or mouth.

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post #38 of 42 (permalink) Old 05-28-2015, 06:20 PM
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Oh wow. Thanks for the safety tip.
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post #39 of 42 (permalink) Old 05-30-2015, 12:25 AM
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For awhile I REALLY wanted to make a side hobby biz out of doing key repairs/upgrades.

When I got my CLK it had the black plastic keys and I really preferred the Chrome metal ones.

So I read what drknight wrote as a DIY and bought some chrome ones on Ebay.

I was extraordinarily lucky and both worked first try. SO I got excited and bought more used Chrome ones on Ebay. Then I discovered why he was charging as much as he did. Most of the ads on Ebay:

1. Know that for 99% of people these keys are worthless.
or
2. Found the key at a bar or somewhere else and decided to sell it for some $$$, thus they have no idea what they are selling, and can't tell you even if you ask.
or
3. Are junkyards just trying to sell some more parts that savvy buyers won't touch. (see #1 )

Most of the ads vaguely mention "see your locksmith for reprogramming" and absolve themselves for responsibility at that point. Most locksmiths will laugh you out of their shop if you ask.

As it turns out, there are several styles of these Chrome keys, the Keyless-Go ones are apparently non-useable. The ones with Triangular "Panic" button are completely useless. And I know this not only because dark night posted it, but also because I bought some, and they are in fact useless. But I didn't mean to buy them, just that is what I got.

But since many sellers are just unloading something they found somewhere, they have no idea what they are selling and may have even used a picture form someone else.

Thus i realized that I got very lucky.

I agree wholeheartedly that having at least 2 keys is crucial. Aside from the fact that I couldn't sleep at night if I had just one, it is so much easier to diagnose problems with 2.

Most of the time my 2nd key is in my safe. When I go out of town on a long trip I bring it.

If the drying and cleaning doesn't work, get $300 or so ready and call the dealer. After that, PM me, I may have a key or two still here. I certainly have a black plastic one or two, may have a chrome as well.

I would love to be able to help people in LA area with this, would be better to be able to test them after moving chip over, rather then mail and hear back, ship back, etc.

I have a computer company and thus a hot air rework station. But originally I did it with a $25 Sears heat gun.

I'm not sure where drknight went, I think he was still on Ebay a while back, but I imagine that he found it a difficult business, possibly for the reasons mentioned.

Also, someone with 1 key doesn't always know for a fact why their car won't start or doors won't unlock. May be the key, may be EIS or radio antenna or IR receiver. With 2 keys, you can quickly diagnose such issues. And then you aren't in a panic to get 1st one fixed.

BTW, if anyone in LA has a "bad" key in a drawer, I may be able to help.

Last edited by 93SoCal400E; 05-30-2015 at 12:29 AM.
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post #40 of 42 (permalink) Old 05-30-2015, 12:32 AM
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I talked to drkknght and he no longer does key repair. He was under another user name on ebay. I tried the electrical cleaner and no luck. The fob has gone to glory. So I has to break down and have to car towed to park place Mercedes. I enjoyed the visit and also got a masonic discount which was nice and a free car wash. So over all it worked out. So next month I will have another key ordered so this won't happen again
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