r129-sl320
New Member
- Joined
- May 14, 2016
- Messages
- 2
- Car
- sl320
In Decemmber 2016 when the temperature outside was very cold i began getting 'battery convenience functions disabled' message on instrument cluster but would go off after a whle of driving. More recently the red 'battery warning visit workshop' message came up and i left the car parked up for two days and the battery was completely drained- no charge left.
I bought a new battery and fitted and the same thing happening and battery completely drained over night.
I charged the battery and refitted and done a voltage check when running and also from instrument cluster which showed UB:11.8v so confirmed alternatir not charging.
I changed voltage regulator on the alternator which i bought from MB and checked the voltage when running which shows 13.8v now.
HOWEVER the red battery warning and the battery convenience warning still show.
The aux battery under the bonnet in showing 12.6v and a drop test shows its ok.
Any ideas on what to look at next?
Thanks
I bought a new battery and fitted and the same thing happening and battery completely drained over night.
I charged the battery and refitted and done a voltage check when running and also from instrument cluster which showed UB:11.8v so confirmed alternatir not charging.
I changed voltage regulator on the alternator which i bought from MB and checked the voltage when running which shows 13.8v now.
HOWEVER the red battery warning and the battery convenience warning still show.
The aux battery under the bonnet in showing 12.6v and a drop test shows its ok.
Any ideas on what to look at next?
Thanks