Hi
If you have trouble with your remote not working I can recommend
I send the two off my C70 for repair and both are now working and have been for last 10 months. Cost is about $50 ea plus postage. Although he does not advertise he does Volvo 70 series remotes just send him a message and he will give you a link. He probably does other Volvos..just send message asking.
Because he repairs you do not have to have it re-programmed.
Hope this helps someone.
Graham