diff --git a/src/trains/diesel_mu/BR150.pnml b/src/trains/diesel_mu/BR150.pnml
index 635c07e..8498133 100644
--- a/src/trains/diesel_mu/BR150.pnml
+++ b/src/trains/diesel_mu/BR150.pnml
@@ -199,6 +199,7 @@ switch(FEAT_TRAINS,SELF,sw_BR150_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR150, 41) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR150);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1984,4,21);
diff --git a/src/trains/diesel_mu/BR150_1.pnml b/src/trains/diesel_mu/BR150_1.pnml
index 6e5fd4a..637e00c 100644
--- a/src/trains/diesel_mu/BR150_1.pnml
+++ b/src/trains/diesel_mu/BR150_1.pnml
@@ -64,6 +64,7 @@ switch(FEAT_TRAINS,SELF,sw_BR150_1_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR150_1, 44) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR150_1);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1985,4,21);
diff --git a/src/trains/diesel_mu/BR150_2.pnml b/src/trains/diesel_mu/BR150_2.pnml
index 7ee545c..e82ca14 100644
--- a/src/trains/diesel_mu/BR150_2.pnml
+++ b/src/trains/diesel_mu/BR150_2.pnml
@@ -162,6 +162,7 @@ switch(FEAT_TRAINS,SELF,sw_BR150_2_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR150_2, 46) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR150_2);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1986,4,21);
diff --git a/src/trains/diesel_mu/BR151.pnml b/src/trains/diesel_mu/BR151.pnml
index 5484ce9..d252629 100644
--- a/src/trains/diesel_mu/BR151.pnml
+++ b/src/trains/diesel_mu/BR151.pnml
@@ -55,6 +55,7 @@ switch(FEAT_TRAINS,SELF,sw_BR151_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR151, 51) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR151);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1985,4,21);
diff --git a/src/trains/diesel_mu/BR153.pnml b/src/trains/diesel_mu/BR153.pnml
index b37dbb1..2988035 100644
--- a/src/trains/diesel_mu/BR153.pnml
+++ b/src/trains/diesel_mu/BR153.pnml
@@ -143,6 +143,7 @@ switch(FEAT_TRAINS,SELF,sw_BR153_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR153, 54) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR153);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1991,4,21);
diff --git a/src/trains/diesel_mu/BR155.pnml b/src/trains/diesel_mu/BR155.pnml
index bbca158..9a74404 100644
--- a/src/trains/diesel_mu/BR155.pnml
+++ b/src/trains/diesel_mu/BR155.pnml
@@ -64,6 +64,7 @@ switch(FEAT_TRAINS,SELF,sw_BR155_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR155, 55) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR155);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1987,4,21);
diff --git a/src/trains/diesel_mu/BR156.pnml b/src/trains/diesel_mu/BR156.pnml
index deff06b..d164557 100644
--- a/src/trains/diesel_mu/BR156.pnml
+++ b/src/trains/diesel_mu/BR156.pnml
@@ -297,6 +297,7 @@ switch(FEAT_TRAINS,SELF,sw_BR156_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR156, 57) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR156);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1987,4,21);
diff --git a/src/trains/diesel_mu/BR158.pnml b/src/trains/diesel_mu/BR158.pnml
index e067f68..6de1201 100644
--- a/src/trains/diesel_mu/BR158.pnml
+++ b/src/trains/diesel_mu/BR158.pnml
@@ -329,6 +329,7 @@ switch(FEAT_TRAINS,SELF,sw_BR158_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR158, 36) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR158);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1989,4,21);
diff --git a/src/trains/diesel_mu/BR158_3.pnml b/src/trains/diesel_mu/BR158_3.pnml
index 43cd18f..f49cfd2 100644
--- a/src/trains/diesel_mu/BR158_3.pnml
+++ b/src/trains/diesel_mu/BR158_3.pnml
@@ -107,6 +107,7 @@ switch(FEAT_TRAINS,SELF,sw_BR158_3_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR158_3, 39) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR158_3);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1989,4,21);
diff --git a/src/trains/diesel_mu/BR159.pnml b/src/trains/diesel_mu/BR159.pnml
index 58235e2..0f57ffa 100644
--- a/src/trains/diesel_mu/BR159.pnml
+++ b/src/trains/diesel_mu/BR159.pnml
@@ -37,6 +37,7 @@ switch(FEAT_TRAINS,SELF,sw_BR159_cargo_subtype_text,cargo_subtype){
 
 item (FEAT_TRAINS, item_BR159, 59) {
 	property {
+		variant_group:					header_Sprinter;
 		name: 							string(STR_NAME_BR159);
 		climates_available: 			ALL_CLIMATES;
 		introduction_date:				date(1993,4,21);