2002 city golf oil light blinking - oil pressure not low

Hi, I have a 2002 city golf. Oil pressure light came onto while driving. Car was serviced 2 months ago. Oil filter replaced and oil.

Checked the oil level before I left, it was good! It ONLY comes on if I brake and while in full stop. Stops blinking when accelerating above 1000RPM.

My speedo cable has a slight jump. Also my Odometer has stopped working. We will be getting a replacement cluster soon. My question.. could it possibly be because of the speedo cable etc not working correctly since its all one unit as I understand??

Just the oil a little while ago - still good

What else could be a problem or concern?

Any suggestions or advice would be appreciated
 

I would suspect that you may have a bad ground on the instrument cluster or that the 12Vdc in is weak as in bad connection.

You could also be dealing with a bad sending unit.

FLickering oil light from hades on my Cabriolets (know good working clusters) were usually too thin a vis on the oil, or a Generic, Storebranded, Fram, Bosch filter.

Are you using too thin of an oil, or a cheap filter?  If not then you may want to replace the sending unit on the head.