Car claims world altitude record after charge into Tibet.
Muscle car named among North America’s best.
Marque favours smaller batteries for electric fleet.
Wall Street boost and Michigan deal deliver wins for electric carmaker.
Newly found faults with inflators prompt global warning.
Companies refute talk of partnership foundering.
Experts hail model as one of the decade's most important cars.
Brand works with Toyota to develop cars for new era of motoring.