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From Sam Edge, Ringwood, Hampshire, UK

You mention the limitations of the drive-assist feature in Tesla cars (6 April, p 6). My biggest concern is that the company .

This will inevitably give people an incorrect impression of its capabilities. If someone is concentrating on reading, for example, then it would take them several seconds to re-engage and assess what needed to be done if the car tried to hand back control or, worse, if it made a mistake but did not announce it.

By this time, on most highways, the pending accident would already have happened.