diff --git a/CN_PROD/slo/Wirkkette_Speech_Service_Reliability_of_key_requests.tf b/CN_PROD/slo/Wirkkette_Speech_Service_Reliability_of_key_requests.tf
index 6cbd3f5..3d6b206 100644
--- a/CN_PROD/slo/Wirkkette_Speech_Service_Reliability_of_key_requests.tf
+++ b/CN_PROD/slo/Wirkkette_Speech_Service_Reliability_of_key_requests.tf
@@ -4,14 +4,15 @@ module Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests {
     
     
     name                        = "Wirkkette \"Speech Service\" - Reliability of key requests"
-    
+
     description                 = "CoCo-QM-Report_Draft" 
     
     
     #entity selector object 
     filter                      = "" 
             
-    #metric expression of the calculation as done in data explorer ui
+    # Error Code 502 in HVD service will be excluded from the SLO.
+    # Therefore the metric server side errors was used for calculation.
     metric_expression           = <<EOT
     (100)-(builtin:service.keyRequest.errors.server.rate:filter(and(or(in("dt.entity.service_method",entitySelector("type(service_method),
                     fromRelationship.isServiceMethodOfService(
diff --git a/CN_PROD/slo/Wirkkette__eRoute_Service__-_Reliability_of_key_requests.tf b/CN_PROD/slo/Wirkkette__eRoute_Service__-_Reliability_of_key_requests.tf
new file mode 100644
index 0000000..5d3e2b0
--- /dev/null
+++ b/CN_PROD/slo/Wirkkette__eRoute_Service__-_Reliability_of_key_requests.tf
@@ -0,0 +1,43 @@
+module Wirkkette__eRoute_Service__-_Reliability_of_key_requests {
+    
+    source = "../../_dynatrace-base-modules/dynatrace-service-level-objective"
+    
+    
+    name                        = "Wirkkette \"eRoute Service\" - Reliability of key requests" 
+
+    description                 = "CoCo QM-Report_Draft" 
+
+    
+    
+    #entity selector object 
+    filter                      = "" 
+            
+
+    #metric expression of the calculation as done in data explorer ui
+    metric_expression           =  <<EOT
+    (100)-(builtin:service.keyRequest.errors.fivexx.rate:filter(and(in("dt.entity.service_method",entitySelector("type(service_method), 
+                    fromRelationship.isServiceMethodOfService(
+                        type(~"SERVICE~"),entityName.in(
+                            ~"Netty on 0.0.0.0:8080 - eroute-ext - prod~",
+							~"Netty on 0.0.0.0:8080 - eroute-adapter - prod~"
+                                )
+                        )
+                        ,entityName.in(
+                            ~"/api/eu/2.5/eroute/protobuf3~",
+						    ~"/api/eu/2.5/eroute-costs/protobuf3~",
+						    ~"/route/eroute~"
+                            )")))):splitBy())
+    EOT
+ 
+    #if not set (removed) it's defaulted to "-1d" 
+    timeframe                   = "-1d" 
+         
+
+    #currently the only possible value
+    evaluation                  = "AGGREGATE"           
+
+    #Target and warning percentage of the SLO as double
+    target                      = 98                            #if not set(removed) it's defaulted to 98
+    warning                     = 99                            #if not set(removed) it's defaulted to 99
+    
+}
\ No newline at end of file
diff --git a/NA_PROD/slo/Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests.tf b/NA_PROD/slo/Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests.tf
index e21807e..02606c0 100644
--- a/NA_PROD/slo/Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests.tf
+++ b/NA_PROD/slo/Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests.tf
@@ -13,7 +13,8 @@ module Wirkkette_Speech_Service_Vehicle_Reliability_of_key_requests {
     filter                      = "" 
             
 
-    #metric expression of the calculation as done in data explorer ui
+    # Error Code 502 in HVD service will be excluded from the SLO.
+    # Therefore the metric server side errors was used for calculation.
     metric_expression           = <<EOT
     (100)-(builtin:service.keyRequest.errors.server.rate:filter(and(or(in("dt.entity.service_method",entitySelector("type(service_method),
                         fromRelationship.isServiceMethodOfService(