Lifetime Premium Member
Date registered: Jul 2008
Vehicle: 2005 CLK500 w/30K
Location: Hollywood, CA
Mentioned: 7 Post(s)
Quoted: 81 Post(s)
I'm the guy who fixes (simple) key issues.
As the post linked to states, I believe VERY STRONGLY that everyone should have 2 @ Smartkeys. It's not just "oh if one breaks/gets lost you still have another" it is also illustrated right here with your wonderings.
Is it key? Is it EIS? Is it fuse? First easy step to find out is to plop the 2nd key in the ignition. Without this 2nd key you are reduced to guesswork. The wire on the inductor is so small you really need a lighted magnifier to check it for breaks. A few drops on hard floors can knock the coil loose. I have also seen them damaged when someone hamfistedly JAMS them into the casing.
I'm in LA and will be out of town for 4th of July until the 10th so i can't help you soon. If you could see a simple solder break it's likely JimmyJohn at the iPhone kiosk could fix it. Junkyards have these keys, you could get one there and remove coil as a donor.
My suggestion is celebrate your FREEDOM on the 4th, freedom from worrying about only having one key. Go to the dealer. Grab your ankles and pay $400 for $20 of parts and have them make you a key. They'll have it Fedexed from Texas in a couple days. Hopefully they won't make you tow it in.
If that key works, PM me and I'll fix the first one.