Looking at changing the headlamp bulbs on my C class it looks like the small cross member above the bulbs, unbolts. Is that to made to be removed to make life easier or am I too optimistic?
The spring arms (there are two on each bulb) push gently towards the bulb (front of car) on each individual arm and move the arm at the same time towards the centre of the bulb. This should release the arm. These do not require too much pressure. Be careful. If you break them you will struggle to hold any bulbs in place.
Visit Halfrauds or mail dealer if you are unsure. For a couple of quid they will do it for you.