ask someone else to do it
Carefully! there very expensive.
where can I buy a retainer clip for headlight bulb of my c200 mercedes
Open hood. Remove headlamp cover by unlocking retaining wires (wires open outward). Disconnect terminal. Remove bulb by pressing round ends and then pulling wire out. Replace bulb and re-assemble.
d2s or a h7
To replace the headlamp in a 2002 Mercedes C180, first open the hood and locate the headlamp assembly. Disconnect the electrical connector by pressing the tab and pulling it off. Next, remove the retaining clips or screws securing the headlamp assembly and gently pull it out. Replace the old bulb with a new one by twisting it counterclockwise, then reassemble everything by reversing the steps.
with your hands ?
1/4 turn to release the old bulb.
http://www.baby-benz.com/portal/lighting/bulb-replacement.html
very carefully very carefully
Don't look on this site anyway
go to halfords