Exhaust sound on cold start up faded after battery replacement.
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Junior Member
Joined: Dec 2015
Posts: 64
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From: Los Angeles , Ca
2011 S63 , 1997 SL500 La costa edition (sold) 1987 560SEC (sold)
Exhaust sound on cold start up faded after battery replacement.
2011 S63, So I replaced my battery , before that the voltage dropped down drastically, I had a couple of warning lights like SRS which went away after a while, the only thing that is still unchanged, is on cold startup the car no longer has this high exhaust rumble which used to last about a minute or so, till the idle drops , also the high idle is much shorter now like only 20 secs tops, don't care much about the sound as long as I know nothing is wrong and it's not damaging the cats or O2 sensors and what not, thanks for any input.
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2011 S63, So I replaced my battery , before that the voltage dropped down drastically, I had a couple of warning lights like SRS which went away after a while, the only thing that is still unchanged, is on cold startup the car no longer has this high exhaust rumble which used to last about a minute or so, till the idle drops , also the high idle is much shorter now like only 20 secs tops, don't care much about the sound as long as I know nothing is wrong and it's not damaging the cats or O2 sensors and what not, thanks for any input.
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Joined: Mar 2019
Posts: 147
Likes: 28
w220 S55 AMG 2004
2011 S63, So I replaced my battery , before that the voltage dropped down drastically, I had a couple of warning lights like SRS which went away after a while, the only thing that is still unchanged, is on cold startup the car no longer has this high exhaust rumble which used to last about a minute or so, till the idle drops , also the high idle is much shorter now like only 20 secs tops, don't care much about the sound as long as I know nothing is wrong and it's not damaging the cats or O2 sensors and what not, thanks for any input.
Thread Starter
Junior Member
Joined: Dec 2015
Posts: 64
Likes: 4
From: Los Angeles , Ca
2011 S63 , 1997 SL500 La costa edition (sold) 1987 560SEC (sold)
No codes stored, using an above average OBDII scanner. I am hoping this will resolve itself in time, I started it this morning (after 48 hours sitting) and it was fine for about 15-20 seconds then dropped down to normal idle, just seems too quick for or maybe now I'm obsessed lol< I just wnna know that nothing is being damaged and I'm ok with it.
Last edited by Xguy; Oct 11, 2022 at 07:53 PM.
Member
Joined: Mar 2019
Posts: 147
Likes: 28
w220 S55 AMG 2004
No codes stored, using an above average OBDII scanner. I am hoping this will resolve itself in time, I started it this morning (after 48 hours sitting) and it was fine for about 15-20 seconds then dropped down to normal idle, just seems too quick for or maybe now I'm obsessed lol< I just wnna know that nothing is being damaged and I'm ok with it.
