Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, fuse 62 in the rear fuse box can be removed for 10 seconds to reset the PSE module in the trunk. Resetting the module may allow the interior trunk release to work. I've attached a fuse box diagram below.
If the fuse is blown it should be replaced but usually you just need to remove the fuse for 10 seconds to reset the PSE module so the trunk release will work again.
Let me know if it works for you.
I sent you a diagram of the rear fuse box located below the rear seat cushion. Did you click on the attachment?
I have sent it again. Click on the attachment below.
Did you receive the attachment with the fuse box diagram?
Try the key blade again. Insert the key and turn it fully counterclockwise and hold it in that position then try pushing in on the button to open the trunk. You have to hold the key in the counterclockwise position (about 10 o'clock) when pushing the button. You might also try having a helper press the trunk release button in the car while you pull up on the trunk lid in case something is stuck in the latch.
It most likely a failed trunk lock assembly. If you are hearing something when you press the key fob it would indicate that the PSE module is trying to open the lock but the lock must have an internal leak and will not release. You should be able to override the lock using the key blade however. Sometimes the mechanism is reluctant to work due to lack of use. We can usually get the trunk open in the shot with some persistence working the mechanical key in the lock. I've attached the instructions for using the key just to be sure you are doing it properly.