reprogrammimg a dash mb or not?

[hooter]

hi guys
im not sure if anybody else has tried it , putting a used instrument cluster into a a160 semi auto . mb say it must be a new one ,my local mechanic sats hes not so sure.would the reproggramming process just be to reinstate your milage??
any advice would be greatly appreciated:

[lofty]

take a look at the mails oat the bottom of my page 12 that may answer your question.
Bert Rowe's Mercedes-Benz-'A'-class info. Fuel Flap lock, Fuel Filter, Fuel lines, Petrol Tank, Petrol Pump, Fuel Level Sensor.