From aa2964d36b0ef16ba84343df45e8aa0a96a73013 Mon Sep 17 00:00:00 2001
From: Rene Nulsch <33263735+ReneNulschDE@users.noreply.github.com>
Date: Sat, 27 Jul 2024 12:42:31 +0200
Subject: [PATCH] Mercedes: fix limit soc panic (#15039)

---
 vehicle/mercedes/api.go | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/vehicle/mercedes/api.go b/vehicle/mercedes/api.go
index aa61e5bb3..1ba5546d5 100644
--- a/vehicle/mercedes/api.go
+++ b/vehicle/mercedes/api.go
@@ -97,15 +97,21 @@ func (v *API) Status(vin string) (StatusResponse, error) {
 		res.EvInfo.Battery.ChargingStatus = 3
 	}
 
-	if val, ok := message.Attributes["selectedChargeProgram"]; ok {
-		res.EvInfo.Battery.SelectedChargeProgram = int(val.GetIntValue())
-		val := message.Attributes["chargePrograms"].GetChargeProgramsValue()
-		res.EvInfo.Battery.SocLimit = int(val.ChargeProgramParameters[res.EvInfo.Battery.SelectedChargeProgram].GetMaxSoc())
+	if val, ok := message.Attributes["selectedChargeProgram"]; ok && val != nil {
+		selectedChargeProgram := val.GetIntValue()
+		res.EvInfo.Battery.SelectedChargeProgram = int(selectedChargeProgram)
+
+		if cps, ok := message.Attributes["chargePrograms"]; ok && cps != nil {
+			if cpVal := cps.GetChargeProgramsValue(); cpVal != nil && res.EvInfo.Battery.SelectedChargeProgram < len(cpVal.ChargeProgramParameters) {
+				if chargeProgramParam := cpVal.ChargeProgramParameters[res.EvInfo.Battery.SelectedChargeProgram]; chargeProgramParam != nil {
+					res.EvInfo.Battery.SocLimit = int(chargeProgramParam.GetMaxSoc())
+				}
+			}
+		}
 	} else {
-		if val, ok := message.Attributes["maxSoc"]; ok {
+		if val, ok := message.Attributes["maxSoc"]; ok && val != nil {
 			res.EvInfo.Battery.SocLimit = int(val.GetIntValue())
 		}
 	}
-
 	return res, err
 }