Massive Revving on Startup? Anyone else?
Member
Joined: Nov 2017
Posts: 114
Likes: 36
2020 E63S, 2020 Jeep Wrangler Sport S
No. The video posted above is definitely not emotion start. I have a 2020 E63s with emotion start, and the only difference is that when holding down one of the shift paddles the car will open up the exhaust vales temporarily and rev slightly higher. I believe it's 400rpm higher. OPs car revs up to 4k which is not normal.
Senior Member
Joined: May 2018
Posts: 389
Likes: 56
E63 AMG Estate
I don’t get it at the start but I’m noticing more and more that when I pull out of a junction or move away from lights, quite often the revs suddenly shoot up and stick around the 3-4,000 when I’m literally doing about 5-10 miles an hour for way too long like 45 secs long. Does anyone know why this is? The dealership said it was normal as the car is expecting me to put my foot down but it’s in comfort mode, sometimes in a shopping mall car park, hardly going to put my foot down!!
Senior Member
Joined: Aug 2019
Posts: 297
Likes: 48
From: Bay Area, CA
2020 E63S Wagon, 2007 335i convertible (tuned to 400hp), 2011 Audi A4 Avant
I don’t get it at the start but I’m noticing more and more that when I pull out of a junction or move away from lights, quite often the revs suddenly shoot up and stick around the 3-4,000 when I’m literally doing about 5-10 miles an hour for way too long like 45 secs long. Does anyone know why this is? The dealership said it was normal as the car is expecting me to put my foot down but it’s in comfort mode, sometimes in a shopping mall car park, hardly going to put my foot down!!
Junior Member
Joined: Apr 2019
Posts: 35
Likes: 19
From: Dallas
2019 E63S Wagon
Had same problem few months ago. My dealer couldn't replicate the high rev start up. Told them to check the fuel injector based upon others having the same problem. They found a slow fuel leak with one of the injectors and decided to replaced it. Been trouble free for the past couple months.
Newbie
Joined: Jan 2020
Posts: 2
Likes: 1
MUSTANG
I hear you. German expertise and quality had been always recognized here in Europe but the last 15 years or so quality has been on decline across products. I guess it's all about this crazy idea of companies have to give more and more profits each quarter and each year. Something has to give
Last edited by bradlydas; Jan 10, 2020 at 07:07 PM.
Junior Member
Joined: Apr 2019
Posts: 35
Likes: 19
From: Dallas
2019 E63S Wagon
With increasing regularity, the car will rev to about 4,500 RPM on startup without me touching the gas pedal (see attached videos). Has anyone else had this issue? The car already spent a few days at the dealer trying to re-create the issue with no luck. Car has not stored any codes or thrown a CEL. Has anyone else had this happen to their car?
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 42
Likes: 6
2018 E63 AMGs
@bradlydas My car got lemoned before they could diagnose this issue. Looks like Foggy had this figured out.
Junior Member
Joined: Jun 2016
Posts: 34
Likes: 4
From: Sin City
2019 Mercedes AMG E63S
Having the same issue on my 2019 E63s. If it were not for this thread not sure my dealer would have figured out the issue, so thank you! I was able to capture the problem on video, plus I sent my service advisor a link to this thread. Just dropped the car off today, will give you an update when I get the car back.
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 42
Likes: 6
2018 E63 AMGs
@Dr.VerSatchi Just an FYI, they never diagnosed the issue on my car. It got lemoned with the misfires before they even looked into this. Good luck....
Junior Member
Joined: Jun 2016
Posts: 34
Likes: 4
From: Sin City
2019 Mercedes AMG E63S
@Dr.VerSatchi Just an FYI, they never diagnosed the issue on my car. It got lemoned with the misfires before they even looked into this. Good luck....
Junior Member
Joined: Aug 2011
Posts: 17
Likes: 4
2019 E63s Polar White
Bad Injector 2019 E63s
I have a 2019 E63s with 2500 miles. I started getting rough starts and the massive rev ups while starting. Thanks to this forum I was able to take the information I found here and point my dealer in the right direction. After some brief diagnostics they determined a loss of fuel pressure when the car was turned off. They determined a leak in injector 3 which they replaced. All has been well since. Thanks to all for the info
Junior Member
Joined: Jun 2016
Posts: 34
Likes: 4
From: Sin City
2019 Mercedes AMG E63S
I have a 2019 E63s with 2500 miles. I started getting rough starts and the massive rev ups while starting. Thanks to this forum I was able to take the information I found here and point my dealer in the right direction. After some brief diagnostics they determined a loss of fuel pressure when the car was turned off. They determined a leak in injector 3 which they replaced. All has been well since. Thanks to all for the info
Newbie
Joined: Jan 2021
Posts: 1
Likes: 0
2021 g63
2021 G63 same issue
I have a 2019 E63s with 2500 miles. I started getting rough starts and the massive rev ups while starting. Thanks to this forum I was able to take the information I found here and point my dealer in the right direction. After some brief diagnostics they determined a loss of fuel pressure when the car was turned off. They determined a leak in injector 3 which they replaced. All has been well since. Thanks to all for the info
Junior Member
Joined: Aug 2011
Posts: 17
Likes: 4
2019 E63s Polar White
Bring evidence Take a video of your startups to the dealer. Thats what I did. They couldn't deny it. All the dealer has to do is measure fuel pressure If fuel pressure is dropping while the car is powered off you have a leaky injector or injectors. If your not getting the response you expect contact Mercedes customer care and complain.
Junior Member
Joined: Jun 2016
Posts: 34
Likes: 4
From: Sin City
2019 Mercedes AMG E63S
I agree, definitely have to take a video. I also took print out of the relevant comments from this forum which detailed the exact issue. I knew my SA would deny any problems without proof (plenty of experience in the past with multiple MB dealerships). It took me almost 2 weeks to catch it on video...I was getting quite annoyed because the few times I forgot to record is when it happened.
Newbie
Joined: Mar 2021
Posts: 6
Likes: 0
C63
Hi guys, I have exact the same problem with my C63s 2016 with 69.000 km.
Dealer could not duplicate the problem or find any error codes or CEL.
They did notice a little rough start but without an error code they could not claim warranty.
Dealer told me the only way to find out is to disassemble the injectors and have them tested.
But if the test shows that the injectors are good, then I have to pay the labor costs which is quite a lot..
Before I take the risk is there a way to found out if a injector is bad or leaking without disassembly?
Dealer could not duplicate the problem or find any error codes or CEL.
They did notice a little rough start but without an error code they could not claim warranty.
Dealer told me the only way to find out is to disassemble the injectors and have them tested.
But if the test shows that the injectors are good, then I have to pay the labor costs which is quite a lot..
Before I take the risk is there a way to found out if a injector is bad or leaking without disassembly?
MBWorld God!
Joined: Dec 2019
Posts: 32,231
Likes: 6,284
Member
Joined: Jan 2021
Posts: 232
Likes: 139
From: Arizona
2019 E63S and 2014 CLS 63S
My 19 has done this a couple of times. While a local shop was installing my upgraded high pressure fuel pump they noticed that it did that as well. Long story short, they replaced the injectors on the drivers bank. They sent out the other injectors to be cleaned and sorted. Ever since they replaced the injectors it hasn't done it.
MBWorld God!
Joined: Dec 2019
Posts: 32,231
Likes: 6,284
My 19 has done this a couple of times. While a local shop was installing my upgraded high pressure fuel pump they noticed that it did that as well. Long story short, they replaced the injectors on the drivers bank. They sent out the other injectors to be cleaned and sorted. Ever since they replaced the injectors it hasn't done it.
