diff --git a/FS25_ADSmartPickup/adRunsController.lua b/FS25_ADSmartPickup/adRunsController.lua
index d52f9ab..9a4670e 100644
--- a/FS25_ADSmartPickup/adRunsController.lua
+++ b/FS25_ADSmartPickup/adRunsController.lua
@@ -47,13 +47,21 @@ function ADRunsController.getFarmVehicles(adEnv)
     return result
 end
 
-function ADRunsController.findVehicleById(adEnv, vehicleId)
+-- Ét map pr. kald i stedet for at genscanne getFarmVehicles pr. vehicleId — startRun/stopRun/
+-- getRunStatus/load slår flere id'er op pr. kald, og GUI'et kalder getRunStatus hvert sekund.
+local function getFarmVehiclesById(adEnv)
+    local byId = {}
     for _, vehicle in ipairs(ADRunsController.getFarmVehicles(adEnv)) do
-        if ADRunsController.getVehicleId(vehicle) == vehicleId then
-            return vehicle
+        local id = ADRunsController.getVehicleId(vehicle)
+        if id ~= nil then
+            byId[id] = vehicle
         end
     end
-    return nil
+    return byId
+end
+
+function ADRunsController.findVehicleById(adEnv, vehicleId)
+    return getFarmVehiclesById(adEnv)[vehicleId]
 end
 
 function ADRunsController.getRunForVehicle(vehicle)
@@ -182,13 +190,18 @@ end
 -- ---- Start / Stop ----
 
 -- AD gemmer indstillinger som INDEKS i values; useFolders er global, rotateTargets pr. køretøj.
+-- Er indstillingen køretøjs-specifik, men køretøjet mangler sin egen settings-tabel, skrives
+-- der IKKE til den globale tabel — det ville ødelægge AD's globale default for alle køretøjer.
 local function setSetting(adEnv, vehicle, settingName, value)
     local global = adEnv.AutoDrive.settings[settingName]
     if global == nil then
         return
     end
     local setting = global
-    if global.isVehicleSpecific and vehicle.ad.settings ~= nil and vehicle.ad.settings[settingName] ~= nil then
+    if global.isVehicleSpecific then
+        if vehicle.ad.settings == nil or vehicle.ad.settings[settingName] == nil then
+            return
+        end
         setting = vehicle.ad.settings[settingName]
     end
     for index, candidate in ipairs(setting.values) do
@@ -247,8 +260,9 @@ function ADRunsController.startRun(adEnv, runId)
     if run == nil then
         return results
     end
+    local vehiclesById = getFarmVehiclesById(adEnv)
     for _, vehicleId in ipairs(run.vehicleIds) do
-        local vehicle = ADRunsController.findVehicleById(adEnv, vehicleId)
+        local vehicle = vehiclesById[vehicleId]
         if vehicle ~= nil then
             local validation = ADRunsController.validateVehicle(adEnv, run, vehicle)
             local result = {vehicle = vehicle, ok = validation.ok, reason = validation.reason}
@@ -277,8 +291,9 @@ function ADRunsController.stopRun(adEnv, runId)
     if run == nil then
         return stopped
     end
+    local vehiclesById = getFarmVehiclesById(adEnv)
     for _, vehicleId in ipairs(run.vehicleIds) do
-        local vehicle = ADRunsController.findVehicleById(adEnv, vehicleId)
+        local vehicle = vehiclesById[vehicleId]
         if vehicle ~= nil and isVehicleActive(vehicle) then
             vehicle:stopAutoDrive()
             stopped = stopped + 1
@@ -289,8 +304,9 @@ end
 
 function ADRunsController.getRunStatus(adEnv, run)
     local running = 0
+    local vehiclesById = getFarmVehiclesById(adEnv)
     for _, vehicleId in ipairs(run.vehicleIds) do
-        local vehicle = ADRunsController.findVehicleById(adEnv, vehicleId)
+        local vehicle = vehiclesById[vehicleId]
         if vehicle ~= nil and isVehicleActive(vehicle) then
             running = running + 1
         end
@@ -345,9 +361,10 @@ function ADRunsController.load(adEnv)
         return
     end
     ADRunsController.store = store
+    local vehiclesById = getFarmVehiclesById(adEnv)
     for _, run in ipairs(store.runs) do
         for _, vehicleId in ipairs(run.vehicleIds) do
-            if ADRunsController.findVehicleById(adEnv, vehicleId) == nil then
+            if vehiclesById[vehicleId] == nil then
                 Logging.info(ADRunsController.LOG_PREFIX .. "run '%s': køretøj %s findes ikke (endnu) i dette savegame", tostring(run.name), tostring(vehicleId))
             end
         end
diff --git a/tests/test_adRunsController.lua b/tests/test_adRunsController.lua
index b57497c..eed3793 100644
--- a/tests/test_adRunsController.lua
+++ b/tests/test_adRunsController.lua
@@ -231,5 +231,19 @@ ADRunsController.installSaveHook()
 ItemSystem.save()
 check("C9 save-hook kaldes før ItemSystem.save", hooked, true)
 
+-- C11: vogn uden egen ad.settings-tabel (ingen rotateTargets pr. køretøj) -> den
+-- køretøjs-specifikke indstilling skrives IKKE til den globale settings-tabel
+adEnv.AutoDrive.settings.rotateTargets.current = 1
+adEnv.AutoDrive.settings.useFolders.current = 1
+local settingsRun = ADRunsController.createRun("Settings Test")
+ADRunsController.updateRun(settingsRun.id, {targetWayPointId = 94, loops = 1})
+local noSettings = makeVehicle("vehicleH", "Uden AD-settings", {STRAW}, 500000, 200, 0)
+noSettings.ad.settings = {}
+ADRunsController.assignVehicle(settingsRun.id, noSettings)
+ADRunsController.startRun(adEnv, settingsRun.id)
+check("C11 global rotateTargets urørt", adEnv.AutoDrive.settings.rotateTargets.current, 1)
+check("C11 useFolders global stadig skrevet", adEnv.AutoDrive.settings.useFolders.current, 2)
+check("C11 køretøjet startet", noSettings.started, 1)
+
 print(failures == 0 and "\nALLE TESTS OK" or ("\n" .. failures .. " FEJL"))
 os.exit(failures == 0 and 0 or 1)