Date registered: Feb 2008
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315CDI Sprinter - Battery light on
I have a 315 cdi 2008 Sprinter (OM646) with 90.000 km on it.
For the last 2 days the battery light has come on, a few seconds after I start the engine, and stays on, as long as the engine runs.
According to the manual it should be either bad battery or faulty alternator.
But the thing is that the car starts fine, and I have been driving for 2 days with it, (aprox. 200 km) So when I got home today I decided to put a charger on to recharge the batteries. But after connecting the charger to the 2 charge points in the engine compartment, and charging for only a few minutes the charger said that the battery was full.
So my questions are.
1. The Sprinter has 2 batteries. When you connect to the charge points will you charge both batteries ?
2. Backup battery is in the front. but where is the main battery located ?
3. When the alternator is running. Will it charge both batteries in parallel or will it switch between them?
4. Any suggestions for what could be wrong. I would assume that driving for hours with a dead alternator, should wear more on the battery than it did.
I will appriciate any suggestions or things I should test.
Thanks in advance.