When Sean and Beverly first arrive in Los Angeles, the taillights on their Mustang convertible are all red except for a small reverse lamp in the lower inside corner of each lamp. As they pull up to their gated community in Beverly Hills, the tail lamps now have a full-height reverse lamp segment in each taillight with red brake/turn lamps on either side.
The tail lights of the Ford Mustang used in the first few scenes change between all red and red with amber center lights. This inconsistency most likely has to do with the show being filmed in London, set in LA. They are identical cars used for shooting, the car with the tail lights all red being shot in the US (the accident scene with Matt) and the other variation being used in London but dressed up in California plates.
When Sean & Beverly Lincoln are waiting for the bath to run, the bathwater remains completely still, despite the taps audibly running.