Hi I have a merc b160 petrol 2010 blue efficiency. Battery light came on . so changed battery. Light still on. Now changed second hand Mercedes identical alternator. Battery still draining and light on dashboard still there. Its a start stop type alternator ECU regulated charging so the re is no separate regulator on the alternator. The alternator seems to be getting hot on idle wuth no extra electrical units running in the car. Help??
Cannot say what fault codes have been reported as they are not able to read the codes
In your experience could 2 alternators be at fault and is the reason why the battery isn't charging?
Or what is the most likely explanation for the new battery going flat? As you are aware the battery sign appears on the dashboard.
Can y help and explain. They are now saying it is the CONTROL UNIT that has burnt out. The unit that controls the alternator regulation.
Can you give me please the exact part and what its called so I can look into it and get the cheapest price for this.