Britax Performance Pad is required to use the Duo Plus Car Seat in any of the following makes of car:
Mitsubishi Colt (3-door and 5-door)
Smart forfour and fortwo
Suzuki Swift (EZ, MZ)
Britax car seat, Adventure, Baby Safe Plus SHR 2, Duo Plus Isofix, Eclipse SI, Evolva 123, First Class Plus, Kid Plus, Kidfix Isofix, King Plus, Safefix Plus, Safefix Plus TT, Multi Tech, Max-Fix, Max-Way, Versafix, Pushchair.