Some knows the procedure to replace a switchboard in a megane (from 98 for more signs). The mechanic tells me that you have to configure it regardless of whether it is new.
Normally the switchboards are already configured those that I have changed as soon as the parameters are mounted, what you have to do is the original immovilizer that could create some problem after the parameters according to the Lacentralita mark automatically limps them or one is given with certain procedures.
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