How to reset immobiliser of 300 sel mercedes 1991?

i have changed the battery of merecedes 300 sel 1991.
immobiliser of car is showing red light as earlier it do but car is not get immobilise.can anyone tell how to reset immobiliser.
Karan Singla, January 2009


done
Hahaha !! Immobiliser nu Tod de !!! Lol !!

Taj, January 2009
i know with some cars u can take both leads off of the battery and toching the leads together drain the copesaters in the memory of ecu. Hope this helps u may want to hold them together for about 5 mins and put them back on and ur car should fire streight up

Bradley, January 2009
link Click here to see other fixes for Mercedes.