W211 E63 Need a second key? Pitfalls to avoid
You must be very careful to ask for a second key, not a replacement key (like a replacement for the lost key). If you are not clear about wanting the old key to work, you may end up with a new key and an old "no longer recognized" key, do you need to ask me how I know?
I didn't realize I had a "dead" key until my wife called from work unable to restart the car. So I took the second key with me to trouble shoot. It turned out to be the battery (it was 5 Fahrenheit) but I discovered the car did not recognize the key I brought at all. I have finally convinced the dealership that I was quite clear that I wanted a second key, that I paid for one but really didn't get it. They are replacing the dead key at no charge and I am grateful for that. These keys are in the $450 range now, so if you need a second key be very specific and check both for function after the new key is programmed.




Interesting thing I learned (somewhat, some concepts I didn't fully grasp). Something about "eight keys already made so have to replace an old code, blah blah". Wouldn't mind some better explanation if someone has one to offer. 2005 E55.
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Interesting thing I learned (somewhat, some concepts I didn't fully grasp). Something about "eight keys already made so have to replace an old code, blah blah". Wouldn't mind some better explanation if someone has one to offer. 2005 E55.
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, 100 years ought to work out okay.