Like nearly all new cars these days, no GLA has a jack or brace, just gunk and a pump.
The manual says this about accessing the lighting cover:
<b style="color: rgb102, 102, 102; font-family: Arial, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: 15px; orphans: auto; text-align: start; text-indent: 0px; text-trans: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; : rgb255, 255, 255;">To remove:[/b]switch off the lighting system and turn the front wheels to full lock. Slide cover<b style="color: rgb102, 102, 102; font-family: Arial, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: 15px; orphans: auto; text-align: start; text-indent: 0px; text-trans: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; : rgb255, 255, 255;">1[/b]up and remove it.
It goes on to explain how to access the bulb, which is probably just as fiddly as most other cars these days.
As for the price, like all things, you will for sure be able to find them cheaper if you search the web, but who knows how long they will last? ...longer than 9 months perhaps!