HomeProjectsAUDI S3 8L G30-700 DSG RETROFIT AUDI S3 8L G30-700 DSG RETROFIT Share Tweet Telegram WhatsApp 20VT 1.8T DSG – DQ250 MQB – STOCK ME7.5 ECU WITHOUT EXTERNAL OR PIGGYBACK DSG CONTROLLER. This special function is a result of custom assembly code on ecu that make this communication between ecu and tcu suitable.