You drive on the A6 until the motorway junction Verona, then continue on the A4 towards Milan. You can find several descents to the highway exit and along the lake until after Manerba drive.
The best way to go but the exit of the A4 Desenzano down and follow the main road about Desenzano, Moniga after Manerba del Garda.
In Manerba go through three roundabouts to the town, where you drive on a roundabout in the direction of San Felice (via Teodora Bresciani), after about 1000m, turn right into via C. Ungaretti and you are on target.