Exactly! Of course you searched our wonderful forum for the answer or your owner's manual?
US law that there be a way to escape the trunk and the light is to help you see to do that
from one's manual push the button
Trunk lid emergency release
With the emergency release button, the trunk
lid can be opened from inside the trunk.
1 Emergency release button
X Briefly press emergency release button
The trunk lid unlocks and opens slightly.
X Push up the trunk lid to fully open.
The emergency release button unlocks the
trunk while the vehicle is standing still or in
Illumination of the emergency release button:
RThe button flashes for 30 minutes after
opening the trunk.
RThe button flashes for 60 minutes after
closing the trunk.
The emergency release button does not
unlock the trunk, if the vehicle battery is discharged
If the vehicle has previously been centrally
locked with the SmartKey, opening the trunk
from the inside using the emergency release
button will trigger the anti-theft alarm system.
To cancel the alarm, see (Y page 64).
I almost bought an MG before finishing my SLK. It was leaking at the rear main and the dealer didn't want to fix. I finally told him look you don't want to put any more time and money in the car, and I don't want a car that's going to ruin my driveway. So we parted ways. I'm soooo glad I bought the SLK instead. Driving that MG was like driving a riding lawn mower.