Is the trip button on your Mercedes-Benz A class 2004 - 2012 not functioning correctly? Maybe the button is stuck or loose in the housing. 
 
If you are experiencing any issues related to this button, this is the repair for you. 
 
What's Included?
 
A new trip/reset button
A new plastic holder
deep clean of gauge panel cluster
 
Things to note
 
Your mileage will not be afffected by the repair
This repair comes with a 1 year warranty
There is no programming required