tips i found out

[Ken_c220]

i discovered two problems with my c220...first the speedo needle used to stick then spring to life around 30 - 40 mph.....i removed the instrument cluster and opened it up and wiped the needles with anti static cloths.. this removed the static build up on the needle and all worked fine,,,,,,however my SRS light was now lit and stayed on for exactly 2 minutes. so my tip is this disconnect the battery or else a fault code is sent to the brain which although fixed by auto electrician for £10 could have been avoided.....hope this helps somebody.....Ken