GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

GL450 underpowered?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 28, 2025 | 04:20 PM
  #26  
735's Avatar
735
Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2018
Posts: 109
Likes: 92
2006 S350L
Honestly, I'd avoid "launching" an X164 considering how expensive it will be to deal with either 7G, Transfer case, or front diff.. (my opinion.. I really don't feel these are "launching" style vehicles tbh..)
Reply
Old May 28, 2025 | 04:30 PM
  #27  
01blackhawk's Avatar
Member
15 Year Member
Photogenic
Liked
Community Favorite
 
Joined: Apr 2011
Posts: 169
Likes: 63
From: Denver
2005 ML500, 2011 E350 4M, 2012 GL550
Talking

Originally Posted by 735
Honestly, I'd avoid "launching" an X164 considering how expensive it will be to deal with either 7G, Transfer case, or front diff.. (my opinion.. I really don't feel these are "launching" style vehicles tbh..)
Add that the engine mounts, tranny mount, drive shaft flex discs etc etc... I absolutely agree with that approach, after all, these are not sports cars, treating a luxury SUV like a sports car would have some stiff financial consequences for sure.
Reply
Old May 28, 2025 | 04:33 PM
  #28  
735's Avatar
735
Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2018
Posts: 109
Likes: 92
2006 S350L
Originally Posted by 01blackhawk
Add that the engine mounts, tranny mount, drive shaft flex discs etc etc... I absolutely agree with that approach, after all, these are not sports cars, treating a luxury SUV like a sports car would have some stiff financial consequences for sure.
I recently bought one of these a couple of months ago and replacing all of what you just wrote & the conductor plate, batteries, airmatic leaking bags, bla bla bla, has cost >6K and climbing.
The last thing I can imagine myself doing is launching it. Yes it's fast no doubt, but.. why.. It just feels like *SO MUCH* is being stressed/torqued when you hit the gas hard on these, I'd try to stay away from the MB parts desk by being soft on this one.. This isn't the type of vehicle for that type of driving..

Reply
Old May 28, 2025 | 05:48 PM
  #29  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by 735
I recently bought one of these a couple of months ago and replacing all of what you just wrote & the conductor plate, batteries, airmatic leaking bags, bla bla bla, has cost >6K and climbing.
The last thing I can imagine myself doing is launching it. Yes it's fast no doubt, but.. why.. It just feels like *SO MUCH* is being stressed/torqued when you hit the gas hard on these, I'd try to stay away from the MB parts desk by being soft on this one.. This isn't the type of vehicle for that type of driving..
The motor mounts is especially a pain especially for 4MATIC vehicles.
Reply
Old May 28, 2025 | 05:49 PM
  #30  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by 01blackhawk
Add that the engine mounts, tranny mount, drive shaft flex discs etc etc... I absolutely agree with that approach, after all, these are not sports cars, treating a luxury SUV like a sports car would have some stiff financial consequences for sure.
Yes lots of things work in conjunction to achieve that.
Reply
Old May 28, 2025 | 05:50 PM
  #31  
735's Avatar
735
Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2018
Posts: 109
Likes: 92
2006 S350L
One thing is for sure, after buying the GL (X164) I am happy I didn't buy a 4MATIC W221
I'd have *DESTROYED* my wallet with that..
I can totally imagine what would have happened to me ..

RWD forever.

X164 = children transporter
W221 = personal transporter

Reply
Old May 28, 2025 | 05:51 PM
  #32  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by 735
Honestly, I'd avoid "launching" an X164 considering how expensive it will be to deal with either 7G, Transfer case, or front diff.. (my opinion.. I really don't feel these are "launching" style vehicles tbh..)
I am curious what OP really wants to achieve though.
Reply
Old May 28, 2025 | 05:52 PM
  #33  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by 735
One thing is for sure, after buying the GL (X164) I am happy I didn't buy a 4MATIC W221
I'd have *DESTROYED* my wallet with that..
I can totally imagine what would have happened to me ..

RWD forever.

X164 = children transporter
W221 = personal transporter
Yup, 4MATIC there is the addition of a transfer case and front differential. There are also particular requirements for the tires and tread level as it might affect the drivetrain.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old May 28, 2025 | 05:53 PM
  #34  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by 01blackhawk
Thats possible, also flaps in the intake manifold, I`d check the codes also a visual check on the lever. Its doesn`t always give a code, depending on what position it got broken and stuck.
Driven both 450 and 550 on the 164 platform, I can tell 550 is a bit more peppy at the launch but 450 is no slouch either, also when you are down to sea level you will have a noticeable difference, they both feel much more alive. Being in CO sucks, especially going to higher altitude.
For sure, really curious and look forward to hearing an update from OP.
Reply
Old May 28, 2025 | 08:02 PM
  #35  
Max Blast's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Loved
Community Favorite
 
Joined: Jan 2010
Posts: 3,118
Likes: 782
NGL450 w/EORP, S550
Originally Posted by W205C43PFL
I am curious what OP really wants to achieve though.
It’s either Baller cred or something terribly wrong with their transmission.
Reply
Old May 28, 2025 | 09:44 PM
  #36  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by Max Blast
It’s either Baller cred or something terribly wrong with their transmission.
Will need OP to update us to be sure.
Reply
Old May 29, 2025 | 08:05 PM
  #37  
lkchris's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2005
Posts: 6,189
Likes: 242
From: Albuquerque
'10 CL550, '12 GL550
My 2007 diesel isn't underpowered either.
Reply
Old May 29, 2025 | 09:44 PM
  #38  
Max Blast's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Loved
Community Favorite
 
Joined: Jan 2010
Posts: 3,118
Likes: 782
NGL450 w/EORP, S550
Originally Posted by lkchris
My 2007 diesel isn't underpowered either.
Eeeeh…. All right I won’t disagree with you.


….except for when it goes into limp mode



Reply
Old May 29, 2025 | 09:45 PM
  #39  
Max Blast's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Loved
Community Favorite
 
Joined: Jan 2010
Posts: 3,118
Likes: 782
NGL450 w/EORP, S550
Originally Posted by W205C43PFL
Will need OP to update us to be sure.
I think Opie has left the chat
Reply
Old May 29, 2025 | 10:24 PM
  #40  
W205C43PFL's Avatar
MBWorld God!
 
Joined: Dec 2019
Posts: 32,382
Likes: 6,327
Originally Posted by Max Blast
I think Opie has left the chat
Yuppers.
Reply
Old Jan 9, 2026 | 11:57 PM
  #41  
gl450BENZ's Avatar
Thread Starter
Junior Member
 
Joined: Nov 2022
Posts: 31
Likes: 2
2010 Mercedes Benz GL450 4MATIC
GL450

Originally Posted by W205C43PFL
Will need OP to update us to be sure.
to be honest was just trying to test out the power, maybe have some “baller cred” as the other guy stated. There is nothing wrong with the car, I just for some reason dont like when the car feels stressed when flooring it. Especially since its a mercedes.
Reply
Old Jan 12, 2026 | 09:28 PM
  #42  
lkchris's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2005
Posts: 6,189
Likes: 242
From: Albuquerque
'10 CL550, '12 GL550
Probably if you had a manual transmission, a 7-speed would be considered a performance item.

The Mercedes automatic has seven speeds for fuel economy reasons. The first couple gears are pretty short and you won't wind out to any particular speed.

You're looking for something the car wasn't designed to be. The top speed your GL450 can achieve proves it's not underpowered, as aerodynamic drag increases with the square of speed and it will require plenty power to pull the top speed your vehicle can achieve.

The next generation GL, the X166, has an AMG version. AMG engine, AMG tuned transmission. Your fantasy vehicle, perhaps?
Reply
Old Jan 13, 2026 | 10:58 AM
  #43  
Elbeau's Avatar
Senior Member
Liked
Loved
Community Favorite
 
Joined: Apr 2023
Posts: 314
Likes: 34
Mercedes gl450
Originally Posted by gl450BENZ
Hello guys,

I have a 2010 GL450. It’s a 4.7l v8 with 335 hp and 339 pound feet of torque. I always felt the car was underpowered for a v8 benz. For instance when I floor it from a stop the RPM shoot up before they shift and the engine sounds stressed. When its in there 3rd gear around 30mph then it feels better when I floor it, but do you guys think this SUV is underpowered? Does making the RPM’s shoot up to 4-5k from a stop bad for the engine? I often like flooring it.
"For a Benz" is like saying "for a vehicle." Different Benz's are made for different purposes. The GL450 isn't made for speed. It's heavy and huge. It's made to transport 7 people and tow. That said, it has plenty of power, just not off the line because it isn't made for that. Nonetheless, with just a little more than typical pressure on the pedal, I easily leave other cars behind starting from a light. Merging onto the highway, I'm usually at highway speed before merging in. Don't stomp on the gas, just give it pressure and the GL450 moves.
Reply
Old Jan 13, 2026 | 11:09 AM
  #44  
chassis's Avatar
Out Of Control!!
MBWorld Ambassador

5 Year Member
Liked
Loved
 
Joined: Sep 2018
Posts: 14,679
Likes: 4,578
From: unbegrenzt
2017 GLE350 4MATIC
Originally Posted by gl450BENZ
to be honest was just trying to test out the power, maybe have some “baller cred” as the other guy stated. There is nothing wrong with the car, I just for some reason dont like when the car feels stressed when flooring it. Especially since its a mercedes.
Have you considered dumping this slow boat of a vehicle and buying something that meets your expectations?
Reply
Old Jan 13, 2026 | 07:26 PM
  #45  
Sallad's Avatar
Senior Member
Veteran: Army
Veteran: Canadian Forces
5 Year Member
Photoriffic
 
Joined: Aug 2018
Posts: 410
Likes: 122
From: Kelowna, BC
08 GL320 CDI
Originally Posted by gl450BENZ
I understand but is flooring it bad for the engine, lets say I am at a stop light and need to merge over and I floor it. It goes up to 5k rpm. Is that bad?

Yes, it puts extra stress on the entire system. Fuel pressures rise to pretty much max the system can deliver, coolant pressures shoot straight up because of the increase in RPMs, everything is “asked” to deliver its full output right off the start.

Now if the vehicle is only a few years old, this isn’t so much of an issue, but as it ages, seals, hoses, fittings, clamps, etc., all loose their original integrity and fail. Could mean a coolant hose that has been fine at lower rpm’s, will now split open when you “floor it”.

The whole “Italian Tune Up” (by revving the **** out of an engine) is 1980s thinking. You can’t flow more fuel over the valves and blow out carbon on a modern engine. Just the increase in airflow (by revving it) is not enough to do anything for carbon. Even soaking an engine doesn’t remove all the carbon, you think a few redline pulls would do it??

Bottom line, these are big family SUVs, they are not going to be fast, they are going to be comfortable and looking good doing it. My diesel has lots of jamb for a big SUV.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 09:26 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE