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Discussion Starter · #1 ·
I have a w177 220 4matic, from 2018.

1. The most pressing issue with the car is this very loud sound (metal), usually when the car is starting to get hot, and it comes from somewhere under, closer to the exhaust:
IMG_6146.mov

2. The other rattle (plastic) is inside the car, usually at high speeds, the faster you go the louder it gets. This recording is not the best, since I am driving in the city, however if you turn up the volume you can hear it: IMG_6144.mov

3. Start & stop never works in any condition.

4. Gearbox is pretty violent at low speeds sometimes

Any suggestions?
 

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Discussion Starter · #2 ·
Manage to solve the first, it was the exhaust flap.
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I can live with 3 and 4, however the second is driving me crazy.

I recorded another video today, where it is clear that the sound is coming from pillar A area (I also opened the window around the end of the video, however not sure if the sound is coming from outside or not): IMG_6176.mov
 

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Your stop/start could be failing to activate due to your car battery voltage being insufficient. Try hooking it up to a charger overnight and see if it helps. Its good practice to fully charge cars batteries annually using a device like a CTEK charger. It not only fully replenishes a battery's charge level, but it also conditions the battery too.
 
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