Hi,
This is my first post, so forgive me if ive posted in the wrong part

I have a mk1 Sportline Convertible, and it makes a buzzing nopise at me. My mechanic says that this is due to an oil pressure warning controller behind the dash, a 2-stage pcb or something, that needs replacing or disconnecting if no longer available. A friend of mine who has had older vw's says that there is no pcb.
Anybody know if this is true, or what I might need to do to sort this problem out?
I'm not averse to actually getting the correct parts to rectify the problem but i dont want to have to pay loadsa cash out.
Any help appreciated.
Thanks.