The E53 Cabriolet is a standalone model for 2021. This Cabriolet is powered by a 3.0-liter turbocharged straight-six that produces 429 hp and 384 lb-ft. Power is sent to all four wheels via a nine-speed automatic transmission. Standard exterior features include LED lighting and a power soft top. On the inside, the E53 Cabriolet features power sport front seats with four-way lumbar support, dual-zone automatic climate control, wireless phone charging, a 64-color LED ambient interior lighting system, a surround-view camera system, a heated steering wheel, and a 12.3-inch infotainment screen with Apple CarPlay, Android Auto, and a 13-speaker Burmester surround sound system. Standard driver assistance features include blind-spot assist, active brake assist, attention assist, and crosswind assist.