diff --git a/FS25_ADSmartPickup/adFieldView.lua b/FS25_ADSmartPickup/adFieldView.lua
index 8950437..f2398e4 100644
--- a/FS25_ADSmartPickup/adFieldView.lua
+++ b/FS25_ADSmartPickup/adFieldView.lua
@@ -79,3 +79,21 @@ function ADFieldView.distanceText(meters)
     if meters < 1000 then return string.format("%d m", math.floor(meters + 0.5)) end
     return (string.gsub(string.format("%.1f km", meters / 1000), "%.", ","))
 end
+
+-- ---- status pr. mark (Fields-listen) ----
+
+-- Årsager der betyder "kan ikke" (rød) — resten er "venter" (gul).
+ADFieldView.ERROR_REASONS = {
+    spu_field_reason_noRig = true, spu_field_reason_cannotDo = true, spu_field_reason_tooWide = true,
+    spu_field_reason_tooNarrow = true, spu_field_reason_widthUnknown = true, spu_field_reason_noSowFruit = true,
+}
+
+-- s = {hasMarker, working, awaiting, startRequested, reasonKey} -> "running"|"waiting"|"error"|"stopped"
+function ADFieldView.fieldStatus(s)
+    if not s.hasMarker then return "error" end
+    if s.reasonKey ~= nil and ADFieldView.ERROR_REASONS[s.reasonKey] then return "error" end
+    if s.awaiting or s.startRequested then return "waiting" end
+    if s.working then return s.reasonKey ~= nil and "waiting" or "running" end
+    if s.reasonKey ~= nil then return "waiting" end
+    return "stopped"
+end
diff --git a/tests/test_fieldStatus.lua b/tests/test_fieldStatus.lua
new file mode 100644
index 0000000..456a430
--- /dev/null
+++ b/tests/test_fieldStatus.lua
@@ -0,0 +1,22 @@
+-- Kør: luajit tests/test_fieldStatus.lua   (fra repo-roden)
+dofile("FS25_ADSmartPickup/adFieldModel.lua")
+dofile("FS25_ADSmartPickup/adFieldView.lua")
+local V = ADFieldView
+local failures = 0
+local function check(name, actual, expected)
+    if actual == expected then print("OK   " .. name) else
+        failures = failures + 1
+        print(string.format("FAIL %s: forventede %s, fik %s", name, tostring(expected), tostring(actual)))
+    end
+end
+check("mangler markør", V.fieldStatus({hasMarker = false}), "error")
+check("arbejder", V.fieldStatus({hasMarker = true, working = true}), "running")
+check("arbejder men venter på maskine", V.fieldStatus({hasMarker = true, working = true, reasonKey = "spu_field_reason_allBusy"}), "waiting")
+check("for bred", V.fieldStatus({hasMarker = true, working = true, reasonKey = "spu_field_reason_tooWide"}), "error")
+check("ingen maskine", V.fieldStatus({hasMarker = true, reasonKey = "spu_field_reason_noRig"}), "error")
+check("regn", V.fieldStatus({hasMarker = true, working = true, reasonKey = "spu_field_reason_rain"}), "waiting")
+check("venter på spilleren (høster)", V.fieldStatus({hasMarker = true, awaiting = true}), "waiting")
+check("start bestilt", V.fieldStatus({hasMarker = true, startRequested = true}), "waiting")
+check("i ro", V.fieldStatus({hasMarker = true}), "stopped")
+print(failures == 0 and "\nALLE TESTS OK" or ("\n" .. failures .. " FEJL"))
+os.exit(failures == 0 and 0 or 1)