triggered

Hi there, Newbie to the forum so forgive me if this is obvious. As per the post title my E320 CDI (2001) Avantgarde has an intermittent fault where the engine revs drop momentarily when driving, knocks out cruise (it will re-engage) and flashes up ABS BAS "Visit the workshop" lights. Then...

I've just bought an '07 E320 CDI and have discovered that both of the NeckPro head restraints are in the triggered position. Does anyone know of any reason why that might be (e.g. caused by battery or power disconnection) or do they only trigger in an accident? Also, does anybody know whether...