MerchoI

Hi all,
Has anyone else experienced the following:
First drive for the day, the GLC300 4matic is reaching 30-31 mph (D4/D5) and "boom" - sudden dull sound from the front – sounds like a spring mechanism has been released. Never again until the car is not parked for a while. Sound is not very loud and is not noticeable on bumpy/noisy roads.
Thanks

JEVA

Is the hood not shut tight?

MerchoI

If the hood is open you get full screen message on the Multi-function Display - can't be missed.

decorily

Is the sound directly related to a gear change?

MerchoI

I don’t think so. Most often happens in D5 at 31mph. Happens only once, unless the car is parked for extended period of time. It’s not very pronounced, so you kind of need to pay attention to hear it. For some reason I’m thinking about the electric parking brake. I was hoping that someone could duplicated it.

decorily

Apart from hearing this sound... would you 'feel' it?

MerchoI

No, however resembles a "pop" sound (like impact from a small stone). Checked in Sport mode - happens in D4 at 31 mph.