So I need to replace the lock cylinder in my daughter's 2001 CLS. Have any of you done this? The remove/replace is simple enough, I'm wondering about the key coding and vehicle theft system. Weekday else will I need to do other than swapping the cylinder

 

Try the link below.

https://acurazine.com/forums/audio-v...s-keys-174639/

 

So I saved myself about 150 bucks doing it this way. I removed the cylinder, took it to a locksmith asks had the tumblers freshened up to the original keys for $40, rather than almost 200 for a new assembly. Works like a champ.