Alloy spacers

Question by popeye posted 6 months 2 weeks ago in CLK-Class

Can anyone please help with the correct size wheel spacers for my 2009 merc CLK 220. It's chassis number is 209. I'm stuck between 2 sizes.

5x112 12x1.5b or
5x112 14x1.5b.
Also not sure whether to use 15 mm spacers or 20 mm ones