With Bub no.3 due in January, we now have to ensure 3 baby seats will fit also.

The following are my findings as I am going through the same thing at the moment trying to source 3 baby seats for the Passat;

Passat Exterior width: 1820mm
Interior (rear) usable width (inner door handle to inner door handle) i.e. narrowest part from door to door: 1333mm

Here are some other cars I am now considering (Comparable interior widths);
1500mm Toyota Torago
1480mm Ford Territory
1450mm Falcon Sedan
1420mm Toyota Kluger
1420mm Holden Sportswagan
1370mm Toyota Aurion / Camry
1320mm Ford Mondeo Wagon
1300mm Holden Captiva LX

Considering that a safe n sound Compaq is 440mm wide, to fit 3 = 1320mm

So things are looking to now be a squeeze.

I have taken our two baby seats out; Safe n Sound Meridian and Maxi Rider AHR.
We are going to a baby shop tomorrow to conduct a test fit of suitable baby seats.

If we can't make it fit, looks like I will need to sell up and get a Falcon...

Will keep you up to date on the outcome...