Key battery replacement.

Hello Does anyone know if the coding in the current MB keys is volatile? i.e. can I just replace the battery myself without losing the coding, and if
so how?
Having written that I bet its in the manual, but maybe someone has some experience of doing it. I have never needed to do it as I don't keep the cars long enough but my SLK has the remote operation of the roof from the key which is bound to accellerate the battery drain by a lot as you have to hold it down for 20 seconds. Or maybe it doesn't ?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Just change the battery... I changed a couple... no problem. Just don't press any button when battery is out.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Thats a good tip. Its the sort if thing I might have done.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.