Another roof query... sorry

[t90ark]

My e89 hasn't been used a great deal lately, and has been sat with a battery conditioner connected. The conditioner, however, rarely shows full. I'm content the conditioner is OK - I've used in on the X5, no worries.

Now, to the roof. If I try to use the roof, I get the red light and 'movement impaired' error. If I drive the car for a short time, I'm talking 10 minutes, the roof will come back to life. Park it up, and go through the process all over again.

I'm starting to lean toward the battery, i know these cars can do some strange things if the battery isnt 100%, but does anybody else have any thoughts?

[B21]

My e89 hasn't been used a great deal lately, and has been sat with a battery conditioner connected. The conditioner, however, rarely shows full. I'm content the conditioner is OK - I've used in on the X5, no worries.

Now, to the roof. If I try to use the roof, I get the red light and 'movement impaired' error. If I drive the car for a short time, I'm talking 10 minutes, the roof will come back to life. Park it up, and go through the process all over again.

I'm starting to lean toward the battery, i know these cars can do some strange things if the battery isnt 100%, but does anybody else have any thoughts?

Yup crappy battery…or at least 90%+ probability…always the first thing to swap out..probably one or more cells dying…very few test measurements will discriminate to the point that an E89 is happy..