2020 S63 AMG Won't Start Intermittently
Thread Starter
Junior Member
Joined: Jun 2014
Posts: 74
Likes: 55
From: Kansas City
S680, GLS 600, SL63, SLS Black Series, Porsche 911 Singer
2020 S63 AMG Won't Start Intermittently
Have a friend with a 2020 AMG S63. Two times recently the following has happened:
He unlocks car
Pushes the start button
Makes one click noise
Won't start
Displays show, ac on low, but car won't start.
He gets out, locks car and if he waits an hour, it will start.
Happened twice. Took it to local dealer, they said battery, alternator and starter were all fine. They said they can do a deep dive for several weeks, but that sounds vague and clueless. To me, someone on this forum will be able to diagnose the issue. He said it doesn't make the standard alternator type noise not working. Just one click and nothing.
He tried getting out, locking car and attempting again after 20 minutes, but didn't not start. Somehow an hour was the magic number. Could this be something related to the master computer? Equivalent to like PCM on a Porsche that has to completely power down to reset. Just trying to help my friend since the dealer seems clueless...
He unlocks car
Pushes the start button
Makes one click noise
Won't start
Displays show, ac on low, but car won't start.
He gets out, locks car and if he waits an hour, it will start.
Happened twice. Took it to local dealer, they said battery, alternator and starter were all fine. They said they can do a deep dive for several weeks, but that sounds vague and clueless. To me, someone on this forum will be able to diagnose the issue. He said it doesn't make the standard alternator type noise not working. Just one click and nothing.
He tried getting out, locking car and attempting again after 20 minutes, but didn't not start. Somehow an hour was the magic number. Could this be something related to the master computer? Equivalent to like PCM on a Porsche that has to completely power down to reset. Just trying to help my friend since the dealer seems clueless...
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,229
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
They offered to do a deep dive for several weeks.
why is this vague and clueless? If they are a competent dealer which they likely are they understand these type of issues are difficult to replicate. They recognize it seems the concern and offered to keep searching. The data you offered is pretty limited and they actually had the car and tested things and scanned it with their computer.
did he own this car since new?
did it just start doing this?
any mods to the car?
when was the battery replaced and if not replaced when was it last load tested?
what codes were pulled?
any dash error messages regarding the keyfob?
when was the keyfob battery replaced?
is the brake switch bad? The brake needs to be depressed to start the car beyond accessory or ON mode
did dealer replicate this? If so what was their specific comment?
what did they test specifically?
once he starts it "after an hour" it's good for the rest of the day or until when?
it would seem to me if they kept the car and replicated the problem they would have more of an idea on how to repair
good luck ... to your friend
$0.02
why is this vague and clueless? If they are a competent dealer which they likely are they understand these type of issues are difficult to replicate. They recognize it seems the concern and offered to keep searching. The data you offered is pretty limited and they actually had the car and tested things and scanned it with their computer.
did he own this car since new?
did it just start doing this?
any mods to the car?
when was the battery replaced and if not replaced when was it last load tested?
what codes were pulled?
any dash error messages regarding the keyfob?
when was the keyfob battery replaced?
is the brake switch bad? The brake needs to be depressed to start the car beyond accessory or ON mode
did dealer replicate this? If so what was their specific comment?
what did they test specifically?
once he starts it "after an hour" it's good for the rest of the day or until when?
it would seem to me if they kept the car and replicated the problem they would have more of an idea on how to repair
good luck ... to your friend
$0.02
Last edited by PeterUbers; May 3, 2023 at 06:29 PM.
Thread Starter
Junior Member
Joined: Jun 2014
Posts: 74
Likes: 55
From: Kansas City
S680, GLS 600, SL63, SLS Black Series, Porsche 911 Singer
They offered to do a deep dive for several weeks.
why is this vague and clueless? If they are a competent dealer which they likely are they understand these type of issues are difficult to replicate. They recognize it seems the concern and offered to keep searching. The data you offered is pretty limited and they actually had the car and tested things and scanned it with their computer.
did he own this car since new?
did it just start doing this?
any mods to the car?
when was the battery replaced and if not replaced when was it last load tested?
what codes were pulled?
any dash error messages regarding the keyfob?
when was the keyfob battery replaced?
is the brake switch bad? The brake needs to be depressed to start the car beyond accessory or ON mode
did dealer replicate this? If so what was their specific comment?
what did they test specifically?
once he starts it "after an hour" it's good for the rest of the day or until when?
it would seem to me if they kept the car and replicated the problem they would have more of an idea on how to repair
good luck ... to your friend
$0.02
why is this vague and clueless? If they are a competent dealer which they likely are they understand these type of issues are difficult to replicate. They recognize it seems the concern and offered to keep searching. The data you offered is pretty limited and they actually had the car and tested things and scanned it with their computer.
did he own this car since new?
did it just start doing this?
any mods to the car?
when was the battery replaced and if not replaced when was it last load tested?
what codes were pulled?
any dash error messages regarding the keyfob?
when was the keyfob battery replaced?
is the brake switch bad? The brake needs to be depressed to start the car beyond accessory or ON mode
did dealer replicate this? If so what was their specific comment?
what did they test specifically?
once he starts it "after an hour" it's good for the rest of the day or until when?
it would seem to me if they kept the car and replicated the problem they would have more of an idea on how to repair
good luck ... to your friend
$0.02
Appreciate the detailed reply!
MBWorld Fanatic!
Joined: Jun 2009
Posts: 3,040
Likes: 125
From: Atlanta Metro
Current: C217 V12TT AMG Previously: C55 AMG, SL65 AMG
Completely different car and powertrain, but for years my C55 would do that very randomly every so often. A nice new battery helped the situation, but I eventually figured out it was the starter that was slowly going bad. Starter replacement fixed the issue.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,633
Likes: 1,218
From: Phoenix
222 S-65
Starters happen. Bet there are 50 or more batteries replaced for the same issue to one dead starter.
Newbie
Joined: Aug 2023
Posts: 1
Likes: 0
S63
2020 S63
Have a friend with a 2020 AMG S63. Two times recently the following has happened:
He unlocks car
Pushes the start button
Makes one click noise
Won't start
Displays show, ac on low, but car won't start.
He gets out, locks car and if he waits an hour, it will start.
Happened twice. Took it to local dealer, they said battery, alternator and starter were all fine. They said they can do a deep dive for several weeks, but that sounds vague and clueless. To me, someone on this forum will be able to diagnose the issue. He said it doesn't make the standard alternator type noise not working. Just one click and nothing.
He tried getting out, locking car and attempting again after 20 minutes, but didn't not start. Somehow an hour was the magic number. Could this be something related to the master computer? Equivalent to like PCM on a Porsche that has to completely power down to reset. Just trying to help my friend since the dealer seems clueless...
He unlocks car
Pushes the start button
Makes one click noise
Won't start
Displays show, ac on low, but car won't start.
He gets out, locks car and if he waits an hour, it will start.
Happened twice. Took it to local dealer, they said battery, alternator and starter were all fine. They said they can do a deep dive for several weeks, but that sounds vague and clueless. To me, someone on this forum will be able to diagnose the issue. He said it doesn't make the standard alternator type noise not working. Just one click and nothing.
He tried getting out, locking car and attempting again after 20 minutes, but didn't not start. Somehow an hour was the magic number. Could this be something related to the master computer? Equivalent to like PCM on a Porsche that has to completely power down to reset. Just trying to help my friend since the dealer seems clueless...
my issue is after driving and I stop, when I try to start it again it won’t start. The radio & everything good but engine won’t start. Wait for like 15mins. Then it’s ready to move, like it’s cooling it self down. Frustrating for this type of car
