Idle problem when headlights on
 

My 16v has developed a idle problem when there is some kind of power consumption. It idles perfectly until I turn on the head lights. When I turn on the head lights it almost stalls and then begins to idle at very low rpms (about 500-550) then when I turn the headlights off it begins to idle normaly. It behaves the same way when I turn the blower to max. Is this somekind of electrical problem ? Where should I look for it and how can it be fixed ???

How old is your battery?
 

Your battery is probably going bad. Also check the brushes in the alternator. :cool:

Is it easy to replace the alternator brushes on the 16v ? Are they accessible ??

If it is a Bosch alternator...yes!
 

The brushes are attached to the voltage regulator, just remove a couple of screws in the back of the alternator. The whole unit will come out. Installation is in reverse order.
Don't forget to check your battery!:cool: