My 2023 GLC 300 4matic occasionally makes a loud clunk sound after starting and shifting into reverse. It sounds like an emergency brake or the mild hybrid is locked and released after shifting into park. Universal question: Is anyone experiencing this too, or have you had it identified and fixed? Thanks.
mikapen
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Quote:
Probably the most-reported sound is the parking brake stuck to the disc, because of rust following a carwash or other dousing.Originally Posted by Redfish0412
My 2023 GLC 300 4matic occasionally makes a loud clunk sound after starting and shifting into reverse. It sounds like an emergency brake or the mild hybrid is locked and released after shifting into park. Universal question: Is anyone experiencing this too, or have you had it identified and fixed? Thanks.
The parking brake is automatically applied at shutdown, but if you release it before opening the door (or some other sequence - I'd have to go out and cogitate) you can avoid the rusting. It's not harmful if that's what you're experiencing.
I had a very similar experience and it turned out to be the transmission. Diagnosed as a problem with the valve body.
