Need some RLM help......

You need RLM 74 & RLM 75 for your upper greys and RLM 65 for the lower color (and RLM 02 was often used as splotching on the sides - check your references). I believe MM Acrylics has all those colors.  I've never seen an RLM reference for Feldblau - that's the field color for Luftwaffe field uniforms (the Wermacht color was Feldgrau).  However, I believe MM Acrylics carries that color under that name.  Can't help you with German Grey because I've never heard of it.

Perhaps the model kit has provided a generic name for 'Deutsches Grau/German Gray'. Germans had a lot of grey colors - this is all in addition to the RAL Grau colors.

RLM 02 RLM Grey

RLM 63 Light Grey (lichtgrau)

RLM 66 Black-Grey (schwartzgrau)

RLM 74 Grey-Green (grungrau)

RLM 75 Grey-Violet (mittlegrau)

RLM 77 Light-Grey (hellblau)

RLM 92 Cockpit Grey

Peace,

John

Here is a site that you will find useful whenever painting Luftwaffe schemes

http://www.ipmsstockholm.org/colorcharts/stuff_eng_colorcharts_germany.htm