Due to legal liability and the potential for you to be KILLED...

I refuse to answer any SRS/airbag questions.

This is where your only safe option is the MB dealer or independent shop...

Even after a battery disconnect, it is possible for static electricity to deploy the air bag.

Static electricity is a real, and deadly danger...

http://www.pei.org/static/

http://en.wikipedia.org/wiki/Electrostatics

http://www.electrostatics.com/page2.html

Static electricity can be generated by the use of tools, repair person sliding across the seat, cutting of safety belts, etc.
It is not possible to determine how much static electricity is present around the vehicle and specifically what wires you or your tools may contact.

This is why you must always treat every air bag system as if it were “live.”