Volvo S80 Engine Surge

My Car Runs Fine, Except It Sometimes Surges When I Am In Park And When I Have My Foot On The Brake. My Dashboard Lighting Will Also Dim...

This Car Will Start To Surge After It Has Warmed Up. There Are No Issues With The Car Prior To Warm Up. The Engine Gently Surges When...

I Have A 2000 Volvo S80 T6 And I Cleaned The Throttle Body And Vacuum Leaks And The Engine Still Surges Does My Software Need To Be Updated

Just Purchased With Cash With Help Because I Needed A Car, And Purchased A 1999 S-80 Volvo T-6 Six Days Ago. As Soon As I Drove Off The Lot...