Hi TAZ. I ordered it through the German Car Company 01702 530440. They specialise in VWs etc, but the Kit is specifically for a 155 and is made by Bonrath. Don't know what code is though, box is at home. They will know which one though when you speak to them. Took about 6 weeks to get uit delivered.
The kit comprises of a complete new mechanism which you attach the existing wiper motor to, and a BOSCH wiper which fits onto the Bonrath arm supplied
the German lads haven't come up with the goods yet I'm afraid. They were stuck on translating a couple of words, and they seemed a bit ****ed off when I kept hassling them so I'll just leave them to it if thats OK?