its a good idea but not essential more important when you reconnect the battery make sure you have a door open if you have central locking ive had loads of cars lock themselves when you flash the battery terminal.!!
Hi Ian H
If your car has ISO connectors you just unplug the old one,remove the cage and fit the new one by plugging into the ISO.My 155 is a 92 and has ISO connectors.I fitted my cd player in 10 mins.I am assuming it,s a single cd player
Hi there ive fitted boot changer under drivers seat 2 amps in boot and never dissconected battery as all of the devices are fused anyway as you never quite know how the cars going to act as the numbers i was given for alarm dont work. frown