I am having issues with my 2000-406 HDI. The speedo will suddenly stop working as I'm driving along and when it does the car loses power suddenly and decelerates, then the speedo comes back to life and the car gets a boost of power an accelerates. This was happening on a intermittent basis-sometimes 3 times a day then not for 1 or 2 weeks. The mechanic changed the sensor and the problem still continued. I have now had the battery changed on the advice of the mechanic who suggested that peugeot batteries do not last that long (ours has been in the car for nearly 9 years). Since changing the battery the same issue has arisen once. There are no faults or errors showing up on the computer scanner-does anybody have any ideas on what I could do next? I am wondering if there is an electrical fault somewhere and if I should take the car to our local auto electrician?