I've read up on self-applying brakes in general but find nothing specific to the above symptom. Seems to me for some reason one of the two left side brakes must have applied of the own volition but I can not deduce any mechanism for this to happen. Rotors and pads seem OK. This happened close to home so I returned and have not again test driven yet. Only happened once. Brake fluid reservoir cap is missing and sealed with bung but it has been this way for 20,000 miles. Brake fluid was changed about 1,000 miles back.