Oil Pressure Switch

[Dan-G40]

Does anyone know what the correct part number or colour is for the oil pressure switch just above the inlet manifold? It looks black to me but when I ordered a cheapy it made the oil light flash... rang VW up today to order a proper one but apparently there are three different types, a grey, a black and another one. I can take the old one out and give them the part number but just wanted to ask on here in case someone has it to hand 

Thanks

[youngprodigys]

both my Gs were different - an early with a blue and brown iirc and my late G with just a black one. its the values on the side (very small stamped letters/number) which state the pressure - may need to give it a quick scrub with some sand paper so you can read it

[hayesey]

yeah I'm not so sure you can go off the colour of it, it'll say what value pressure switch it is in writing stamped on it.