There is a computer called the BCM that means body control module, it may be failing or have bad connections.
SOURCE: S80 electrical issues
Sounds like the rear electronic module is malfunctioning. How do you get the trunk open to find out the light is not working? The REM controls all of the functions you describe in your post. If you can get the trunk open then to this:
Disconnect the positive and negative cables from the battery and touch them together for at least 5 minutes. Don't worry, you will not be doing any damage to the car or yourself. Place the cables back onto the battery and then lock and unlock the car. See what happens. If it works then your rear electronic module (REM) needs a software upgrade at your Volvo dealer, about $120 USD.
Hope this helps.
SOURCE: 2007 Saturn Aura; when trying remote start horn
press the lock button on the remote then press the remote start button. if this does not work check remote start status using steering wheel buttons
SOURCE: I have 2009 Saturn Aura XE. My bluetooth was
There is a software update that you will need to have the dealer apply. I had the same problem and it was fixed in 45 minutes.
SOURCE: how do you replace low beam headlight on 2008
Access to change the headlamp bulbs is through the wheel well. The recommended method is to remove the front tire and then the plastic inner fender liner. Once removed, you'll have easy (more or less) access to the rear of the headlamp housing.
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