On my 2000 Octavia, use a small screwdriver in the little slot under the Skoda badge to remove the key. Then use the screwdriver to open out the two clips and seperature the two halves of the transmitter. Then carefully lever out the batteries. There are two CR2016 batteries.
Britain has been revealed as a nation of hidden business fleets, with one third of British drivers who drive as part of their job uninsured for business miles, according to research from telematics company Masternaut.