# What causes this rattle? (Please listen to 10 sec. recording) **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mercedes-benz, e-class\ **Created:** [December 14, 2022, 10:15pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935 "2022-12-14T22:15:36Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![ronalddoornink\_183336](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@ronalddoornink\_183336](https://community.cartalk.com/u/ronalddoornink_183336)\ **Post date:** [December 14, 2022, 10:15pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/1 "2022-12-14T22:15:36Z")
It is a 2001 with 75K miles and recently developed a weird rattle. It seems to be coming from underneath the car. It only rattles when in gear, not when idling or in neutral. I checked the transmission oil level and it is okay. No leaks on the floor under the car. Could it be the cat? Here is the sound recording: [Dropbox - Car Noise.wav - Simplify your life](https://www.dropbox.com/s/3mghvge8zdbtcg6/Car%20Noise.wav?dl=0) Please let me know. Thank you! ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [December 14, 2022, 10:18pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/2 "2022-12-14T22:18:54Z")
> [@ronalddoornink\_183336](#): > > Please LMK. I can almost gaurantee that not everyone who reads this post will know what LMK stands for . LMK – Let Me Know . ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [December 14, 2022, 10:27pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/3 "2022-12-14T22:27:13Z")
The link does not work. but I will take a guess and say it is probably coming from a loose exhaust part or a heat shield. ---
**Author:** ![ronalddoornink\_183336](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@ronalddoornink\_183336](https://community.cartalk.com/u/ronalddoornink_183336)\ **Post date:** [December 14, 2022, 10:32pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/4 "2022-12-14T22:32:10Z")
Thank you. Im working on fixing the link. ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [December 14, 2022, 10:50pm UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/5 "2022-12-14T22:50:13Z")
Sounds like the flex plate is cracked or torque converter bolts are loose. ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [December 15, 2022, 1:51am UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/6 "2022-12-15T01:51:59Z")
Does it do it in reverse too? ---
**Author:** ![ronalddoornink\_183336](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@ronalddoornink\_183336](https://community.cartalk.com/u/ronalddoornink_183336)\ **Post date:** [December 15, 2022, 1:54am UTC](https://community.cartalk.com/t/what-causes-this-rattle-please-listen-to-10-sec-recording/187935/7 "2022-12-15T01:54:36Z")
Yes it rattles when in drive and reverse mode, but not when in park or neutral.