madfred

I installed the "new" battery, also another ground cable with the BMS was installed. Apparently the BMS is reset when adapting the new battery by entering the BEM code as shown on the battery. The battery level is still showing 100%, but that might be correct. I will have to monitor the battery level the next couple of days or so to see what happens.

Ok, thanks for your help so far!

OK, got the charging part, thanks for clarifying. About the BMS reset, do you know the procedure when using VCDS?

I found a description. Remove/disconnect the battery, wait at least 30 minuten, reinstall/reconnect the battery. Another question, when recharging the battery whilst in the car, the plus of the charger has to be connected to the plus of the battery. The negative has to be connected to the negative of the battery (bypassing the BMS) or to the ground, including the BMS in the circuit. I assume the BMS is the small unit integrated in the cable from the battery negative to ground?

What is the reset procedure for the BMS?

I am charging it outside the car using a CTEK MX 5.0 charger. Actually I was charging it, the cycle has already finished. I will install the battery later today.

I purchased another, used battery. This one is an original Audi (Varta) battery, I also purchased the negative cable with the BMS in it. I am recharging and reconditioning the battery right now. I will install the battery and the cable within the next couple of days. Hopefully that will solve the problem.

Ok, thanks anyhow. Merry Christmas and a happy Newyear.

Yes, it was coded.

The batterylevel in my A4 B8 1.8 TFSI is always indicating 100% on MMI, even when I'm sure it isn't at 100% The battery does not have a BEM code, but was entered as a generic type. The problem now is that because it is showing 100%, the car will not try to charge the battery. Is there a way to overcome this problem, maybe forcing the level to be less? I do have VCDS.