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does not need programming but without the smarttop mod you have to point the key fob at the door handle and be very very close to it. search for smarttop mod and it has a lot of features. key fob uses ir and smarttop lets your key fob use rf.
do you have a manual? all explained in there
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The r171 can be opened with the key from close proximity (less than a foot) through an IR sensor in the door handle. An after market opener called a "SmartTop" can also be installed. But I don't think that the r170 has any remote capability straight from the factory.
You have to install an aftermarket module for the R170. It never had a factory option for remote operation of the roof.
I have the Bipes Roof Module installed, and it's one of the best mods you can do for the R170.