This is my old 450 (2007) and has only 80k miles. Nothing but trouble since 4 year warranty expired . Latest is that ignition switch acting up. Sometimes it doesn’t truth all the way and sometimes if it does starter doesn’t turn on. If I am lucky , all goes as planned and it works.
what are my options? Looks like getting ignition switch replaced will run me close to $1400

 

Now that you know what to focus on, you can get comfortable with what maybe a 5mn soldering job. See how much time $1.5 is worth.
Every style of MB ignition module features a different flavor of similar goodness.

A new switch needs to be coded to your car and your keys.... repairing your own bypasses these unnecessary steps if successful.

 

Is there any kb or a video somewhere to refer to ? I am quite comfortable trying it but not sure where to begin

 

There are many threads showing how to do it in the forum. Try to search here or YouTube…

 

Opened my switch from 2007 gl450 and it is very different from what is in most videos. There are two separate circuit boards that are connected to each other via some pins. I didn’t find anything visually wrong and no solder needed repair. Cleaned everything with electronic spray and assembled back. Seem to be working but time will tell. Issue was intermittent so keeping fingers crossed