This is being looked into right now by Here, VW etc. Their plan is to for all cars that use the Here map backend (All Merc, BMW, VAG cars plus probably others w

This is being looked into right now by Here, VW etc. Their plan is to for all cars that use the Here map backend (All Merc, BMW, VAG cars plus probably others who join down the line) to send updates automatically. MobilEye (now owned by Intel) is working on a similar system.