I have a 1999 306 HDI with around 93,000 on the clock. We've had it for several years and do very few miles in it, only around 4-5000 per year these days as it is a second car. It has always been pretty reliable aparrt from a few of the usual French electrical gremlins. Recently I have noticed that it is low on power, almost like the turbo is not working. Having looked around the 'net' I see a lot of people talking about the MAF but I am not exactly sure where this is located or how to remove it.

There are no warning lights showing up on the dash, it starts and actually runs fine but is just lacking it's usual power.

Any help or ideas with this problem would be most appreciated.