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Scraping/ rusty noise on acceleration

Lcm

New Member
Joined
Apr 9, 2021
Messages
3
Location
Haverhill
Car
Mercedes B Class 1.7 petrol
Hi
Please forgive any ignorance, I'm new to Mercedes and not exactly full of knowledge on cars anyway.
Recently purchased a little 06 plate B Class, 1.7 petrol. I've noticed that when accelerating, especially at slower speeds, there is a scraping sound, I'd describe it as a 'rusty' sound. The sound goes away once speed is hit for that gear? I also noticed when sitting idle and then putting in gear or taking out of gear, there is a small 'clunk' sound. Don't know if the two are connected. The dash flashed up with Battery alternator visit workshop aswell.
The previous owner said the alternator was replaced about 4 years ago.
Any thoughts greatly appreciated.
 
Manual
 
Could be a stone behind the brake disc shields or the disc shields themselves could be loose and scraping against discs.
 

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