2006 E350 4matic Battery Light On and ABS light on
After driving the car for a few miles, the RED Battery light comes with and ABS light comes on and Accessories like A/C and vent turn off.
What i did was :
1. Replaced Auxiliary battery (Oreily autoparts)
2. Replaced the Auxiliary battery relay (Oreily autoparts)
3. Checked Main battery and tests Good, checked Auxiliary battery and tests Good.
4. Checked all other fuses and none are blown.
5. Checked the charging system and alternator, and checks out good.
Does anyone have any other suggestions on what to do?
The main battery was checked at Oreilly autoparts with their tester and checked good.

The auxiliary battery AGM i bought at oreilly, im thinking thats the culprit? or is it the alternator? main battery checks out fine


