When Mr. Bean locks and leaves his car you can clearly see the steering wheel in its position but when the car thief tries to jack the car the steering wheel disappears, and in the next scene it is found in Mr. Bean's suitcase.
When Mr. Bean drives to the dentist and is trying to dress himself, outside the window, the scenery keeps changing dramatically between shots. In some shots he is driving along a single lane highway with buildings on the sides and in other shots he his driving along a divided highway with no buildings on the sides, all in the time it takes for him to get dressed.
When Mr. Bean is changing in his car, he first has his pajama pants on. The camera angle changes to a rear shot and he is now wearing slacks. Another camera angle change and he is back to wearing pajama pants. He then changes into the slacks.
When Mr. Bean is about to wake up, the "seconds hand" on his clock doesn't move.
When Mr. Bean first puts his feet on the steering wheel to steer the car, there are no keys in the ignition.
When Mr Bean rushes to his car in his pajamas, two men on the other side of the street walking towards the camera can be seen watching all the action, presumably having seen all of the camera equipment and crew. When Mr Bean takes off and knocks over the garbage cans, one of the men jumps up and slaps his thigh as he laughs at the scene.
When Mr. Bean's foot touches the centre of the steering wheel the horn is sounded, however the horn button for his car is not located on the steering wheel, rather on the right hand side indicator stalk. Pushing the centre motif on the steering wheel would not sound the horn.
While Mr. Bean is driving to the dentist's office and getting dressed in his car, one shot is an overhead shot of the car and on the reflection of the windscreen, the camera crane can be seen filming the shot.