The solenoid in my 19 has failed almost completely. That could be the problem. You'll need a small hammer or similar. Reach down behind the engine and look for a light-coloured metal object about the size of a tin can. (Or you could ask someone to find it for you, I don't have the car here to give better directions.) Tap it vigourously with the hammer and see if that works. The solenoid has only one moving part and it can become stuck, this should dislodge it.
Hope that helps.
C>Lemon
July 2009