If you have an electric awning and the motor quits while it's extended, the only way to get it rolled up is manually. And for that you will need an awning strap that attaches into the groove in the awning roller, a reliable helper, a ladder, a screwdriver, and a working cell phone in case your helper is not so reliable (to call 911 for an ambulance). The awning strap is the same one that is used for manual awnings, so it's not some special order accessory. Per the operating instructions, while someone holds the awning extended with the strap, victim #2 gets on a ladder and removes the spring retaining screw near the motor. When the screw is removed, the awning will want to roll up. If the assistant is daydreaming, victim #2 may get smacked over the top of the rig if he's not careful. Once it's rolled up, reinsert the screw to prevent the awning from unrolling as you drive to the repair shop. Depending on where you are, you may be able to get a mobile tech to fix it, but make sure Dometic is onboard with it. Their website or 1-800 # can give you a list of techs in your area.
The .pdf for the instructions can be found in the Tools tab, under Heartland Owners Manuals. Go to Exterior and then Awning. Open up the Dometic A&E file and it will provide the information you need.
And if I hadn't zipped past it, I would have seen that Jim B put the instructions in his post....DUH!