Hi, I recently bought a 2003 M3 and discovered the M-Mobility kit was missing. The dealer shipped me a new one but it doesn't seem to fit in the styrofoam cut out in the trunk. The Mobility system is too big for the cut out. Does anyone know if there are different systems for different models and/or years? I noticed some threads referring to MMS-1 and MMS-2. Did they change the design? Thanks.