2013 GL450 Low Boost P0299
Thread Starter
Newbie
Joined: Feb 2019
Posts: 3
Likes: 1
GL450
2013 GL450 Low Boost P0299
Hi, I have a 2013 GL450 and I'm getting a low boost code P0299. The dealer says the code is for "turbo 1". Anyone know which side that is?
Also, they say it is due to the turbo linkage binding. Has anyone had this issue before? They want $12k to fix this. It seems like there has to be a better option to fix this if it's the linkage.
Thanks for your help!
Also, they say it is due to the turbo linkage binding. Has anyone had this issue before? They want $12k to fix this. It seems like there has to be a better option to fix this if it's the linkage.
Thanks for your help!
Senior Member
Joined: Jan 2015
Posts: 306
Likes: 78
gl450
Passenger side. The reason they want so much money is that they will likely replace the whole turbo/exhaust manifold and for this the engine needs to come out.
I would take the car to an independent mechanic and see if they can replace the wastegate actuator/rod by itself without removing the engine. The rod itself is removable, the question is can you get to it.
But if it's the linkage on the turbo that the actuator rod connects to that is binding - then the turbo needs to be replaced and the engine has to come out.
Good luck!
I would take the car to an independent mechanic and see if they can replace the wastegate actuator/rod by itself without removing the engine. The rod itself is removable, the question is can you get to it.
But if it's the linkage on the turbo that the actuator rod connects to that is binding - then the turbo needs to be replaced and the engine has to come out.
Good luck!
Last edited by mtm; Feb 25, 2019 at 08:24 AM.
MBWorld Fanatic!
Joined: Jan 2007
Posts: 2,004
Likes: 241
From: Usa
mgLipGD
Ok so yes same code P0299. Notes on the service papers say "under boost codes, waste gate arm is loose". States they replaced a vacuum hose on driver side turbo cut by drive belt. Part #278-098-07-89 listed as air line.
Course that code is generic for under boost so the cause of your boost loss may be diff but worth a check. The part is listed as $67, labor was $405, covered by the warranty we had.
Link to part for $30ish and diagram, no affiliation with site: https://www.mboemparts.com/oem-parts...ube-2780980789
Course that code is generic for under boost so the cause of your boost loss may be diff but worth a check. The part is listed as $67, labor was $405, covered by the warranty we had.
Link to part for $30ish and diagram, no affiliation with site: https://www.mboemparts.com/oem-parts...ube-2780980789
Newbie
Joined: Aug 2017
Posts: 13
Likes: 2
2013 GL550
Do you happen to have any updates? My wife’s GL550 just threw this code. A quick glance and I didn’t see anything out of the normal. Car drives fine and isn’t down any power. I have new air filters coming in a couple of days and I plan to do a little more digging then.
Trending Topics
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
Junior Member
Joined: Jan 2019
Posts: 21
Likes: 2
'13 GL450, '02 E55
All dealerships are on crack. My local dealer charges $186/hr labor, while independent specialists charge $110-140. But I got a brand new GLC loaner car for 5 days so someone has to pay for those perks...
Front upper control arm bushings job was $1300 with local dealership here in Houston. My deductible $100.
Front upper control arm bushings job was $1300 with local dealership here in Houston. My deductible $100.
Junior Member
Joined: Dec 2023
Posts: 39
Likes: 2
2015 Gl450
Hey there!
The car is 2015 GL450. My dealer diagnosed the same issue. P029900 (The boost pressure of Turbocharger 1 is too low). Guided test showed Y77/1 Valve does not have correct duty cycle. They removed vacuum lines from turbocharger was gates. Vacuum tested waste gates found right side holds pressure but left side leaks down.
Obviously, they suggest to replace the whole turbo. Any suggestion where to check first? There was another theme where people told to check the actuators. On both sides (left and right turbochargers) there is a small backlash when the car is not running. When I start the car I can see both rods on left and right actuators slightly move but not only forward/backward but also up/down. This is barely noticeable.
I'd appreciate any help.
The car is 2015 GL450. My dealer diagnosed the same issue. P029900 (The boost pressure of Turbocharger 1 is too low). Guided test showed Y77/1 Valve does not have correct duty cycle. They removed vacuum lines from turbocharger was gates. Vacuum tested waste gates found right side holds pressure but left side leaks down.
Obviously, they suggest to replace the whole turbo. Any suggestion where to check first? There was another theme where people told to check the actuators. On both sides (left and right turbochargers) there is a small backlash when the car is not running. When I start the car I can see both rods on left and right actuators slightly move but not only forward/backward but also up/down. This is barely noticeable.
I'd appreciate any help.
Member
Joined: Oct 2009
Posts: 214
Likes: 38
From: East Idaho
2014 GL450, 2006 S500, 2003 ML350, 1996 C280 (Prev 1995 C220, 2002 CLK320, 1980 300SD Turbo)
Greetings, I'm in the same boat here and slightly off topic question - does anyone have any experience with the aftermarket cheap actuators that sold on ebay/ali ? It's hard to find the actuator sold separately (if you have a link, thanks) - so I'm thinking to buy a used turbo or roll the dice on the cheap actuators.
I saw an interesting video on Tasos Moschatos great channel, where he took one of the actuators and it was filled with oil. He said he didn't know why it happens but they get oil in there. I did a vacuum test and it holds for a while and then slowly loses vacuum. Hoping that's the cause.
I saw an interesting video on Tasos Moschatos great channel, where he took one of the actuators and it was filled with oil. He said he didn't know why it happens but they get oil in there. I did a vacuum test and it holds for a while and then slowly loses vacuum. Hoping that's the cause.
Super Member
Joined: Jul 2019
Posts: 733
Likes: 297
From: New Orleans
2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
It is filled with oil because check valve on vacuum pump fail. Similar disease for BMW and etc. Either way buy new Chinese actuator from aliexpress and swap if can't afford originals.
Member
Joined: Oct 2009
Posts: 214
Likes: 38
From: East Idaho
2014 GL450, 2006 S500, 2003 ML350, 1996 C280 (Prev 1995 C220, 2002 CLK320, 1980 300SD Turbo)
Thanks - this was my biggest fear after seeing that outcome on others. Xentry passed the actuator test, so instead of getting into the turbo I decided to change the boost control valve as I heard that's also a common failure point. I didn't perform the test and don't typically like throwing parts at problems but with this engine and these turbos I'll gladly start with the 50 dollar part up top first. Will post my results.
Junior Member
Joined: Oct 2010
Posts: 44
Likes: 4
From: New Jersey
2012 CLS63, 2015 GL450, 2014 ML350
I am getting the P0299 low boost code but only pending and it never confirms. The car runs fine and I can feel when the turbos kick in. I checked vacuum by tapping into the line going to each wastegate actuator and the arms pull fine with 0 leak down. I do see a small amount of leak down at the vacuum solenoid though. I checked the input side of the solenoid with the engine off so it should have been completely closed. I lost about an inch every 30 seconds. Should I be concerned and replace the solenoid?
Member
Joined: Oct 2009
Posts: 214
Likes: 38
From: East Idaho
2014 GL450, 2006 S500, 2003 ML350, 1996 C280 (Prev 1995 C220, 2002 CLK320, 1980 300SD Turbo)
I am getting the P0299 low boost code but only pending and it never confirms. The car runs fine and I can feel when the turbos kick in. I checked vacuum by tapping into the line going to each wastegate actuator and the arms pull fine with 0 leak down. I do see a small amount of leak down at the vacuum solenoid though. I checked the input side of the solenoid with the engine off so it should have been completely closed. I lost about an inch every 30 seconds. Should I be concerned and replace the solenoid?
Newbie
Joined: Sep 2024
Posts: 1
Likes: 0
C300 2016
Subject: Turbo Boost Issue and Stored Code
Hi everyone,
I was experiencing the same low boost issue and had a similar error code. The dealer quoted me $8,000 for repairs, claiming the turbo needed replacement. After doing some research, I decided to replace the turbo wastegate actuator instead. After making that change, I noticed that all the power has returned!
However, the engine light is still on as a "stored code P0299." Do I need a specific scanner to clear this code? I tried using a basic scanner, but it didn’t work. My car is running great otherwise, and I’ve ordered an iCarsoft scanner to see if it can help clear the stored code.
Has anyone else encountered this issue? Any advice would be appreciated!
Thanks!
Hi everyone,
I was experiencing the same low boost issue and had a similar error code. The dealer quoted me $8,000 for repairs, claiming the turbo needed replacement. After doing some research, I decided to replace the turbo wastegate actuator instead. After making that change, I noticed that all the power has returned!
However, the engine light is still on as a "stored code P0299." Do I need a specific scanner to clear this code? I tried using a basic scanner, but it didn’t work. My car is running great otherwise, and I’ve ordered an iCarsoft scanner to see if it can help clear the stored code.
Has anyone else encountered this issue? Any advice would be appreciated!
Thanks!
Newbie
Joined: Oct 2024
Posts: 1
Likes: 1
Subject: Turbo Boost Issue and Stored Code
Hi everyone,
I was experiencing the same low boost issue and had a similar error code. The dealer quoted me $8,000 for repairs, claiming the turbo needed replacement. After doing some research, I decided to replace the turbo wastegate actuator instead. After making that change, I noticed that all the power has returned!
However, the engine light is still on as a "stored code P0299." Do I need a specific scanner to clear this code? I tried using a basic scanner, but it didn’t work. My car is running great otherwise, and I’ve ordered an iCarsoft scanner to see if it can help clear the stored code.
Has anyone else encountered this issue? Any advice would be appreciated!
Thanks!
Hi everyone,
I was experiencing the same low boost issue and had a similar error code. The dealer quoted me $8,000 for repairs, claiming the turbo needed replacement. After doing some research, I decided to replace the turbo wastegate actuator instead. After making that change, I noticed that all the power has returned!
However, the engine light is still on as a "stored code P0299." Do I need a specific scanner to clear this code? I tried using a basic scanner, but it didn’t work. My car is running great otherwise, and I’ve ordered an iCarsoft scanner to see if it can help clear the stored code.
Has anyone else encountered this issue? Any advice would be appreciated!
Thanks!
