Hello have a problem with the keyless entry with my xc90 Have already changed the battery with both keys.. Unfortunately without success, can this lie in the context of the 12 V vehicle battery, since I have already had a long problem with the start stop and the stationary heating. In this connection my Volvo workshop manager once told me that stop-go and stationary heating would not work because the 12-volt battery would be almost at the end. But did they not change at the time because the car still sprang well and the costs of a new one are not exactly given. So can now also keyless entry be used in connection with it?