Will this mirror connect to my Sprinter's existing wiring harness?

Yes—this is the OE mirror, so it plugs into your factory electrical connectors. No rewiring or adapters needed.

Do I need to remove the door panel to install this?

Mounting hardware and procedure are factory-standard for your year—refer to your Sprinter service manual for step-by-step door panel removal and mirror bracket access.

Can I use just the heating function, or do the turn signals operate independently?

Heating and signals operate on separate circuits. Heat runs on demand when activated; turn signals function through your vehicle's lighting control regardless of heat status.