GLK350AMG

When the automatic trunk opens, I hear a big "clunk" right before it fully opens.

Has anyone heard this noise?

rmfnla

Yeah, it's the lock disengaging; it's normal...

koalatm

Ours also squeaks/creaks when it starts to open, too.

GLKforever

I believe it's a common issue on GLK (design flaw). I don't think it's related to the lock itself. Quick fix (if we can call it fix) would be to adjust the tailgate opening limit to slightly below the point where you hear that loud "click" noise

GLK350AMG

GLKforever, good point! I'll give that a try. The reason I posted this question was to find out if I needed to bring it in for servicing.

bop11

If there is a clunk, I would check to see if the hinges are loose. The struts may go over center and cause a latching or the tailgate may actually move. With the gate open grasp the two corners and see if there is any play or looseness. Also check that the headliner is not being moved by the tailgate. When the gate is closed does it lineup properly with both sides and the bottom? If not it indicates that the hinges are not aligned properly. It should be a nice smooth open and close even the latch pull-in.

GLK350AMG

Thanks. I'll give that a try also. :-)

rmfnla

I listened to mine more closely and it does give a "pop" when the lock disengages but I wouldn't really call it a "big clunk"...