04 CLK500 hesitation during acceleration
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Joined: Apr 2011
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2010 Charger SRT8
04 CLK500 hesitation during acceleration
Hows it going guys, were trying to figure out whats going on with my friends 04 CLK500. It just started this out of no where. In the mornings when going from a stop the car hesitates to go as if it wants to stall but it doesn't. its weird because it only does it in the morning for some reason, also I notice the car shifts really late to but once I turn the car off and turn it back on the shift problem goes away. Anyone know what would cause this? 04 CLK500 85k miles
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Joined: Nov 2011
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From: Arizona
e63 NA
Hey Bud,
I have the EXACT same issue on my 2006 CLK500 with about 80k miles. Only in the mornings, sometimes when I go to pull out on the main road it just hesitates like it is about to stall and then it doesn't. This lasts for maybe 1 second total (which is long time at that point) and then continues normally.
I've also noticed it hanging in gear a little longer but I assumed that was just due to how my adaptive driving updates. I do the "sneaky ecu reset" which is simply just removing your adaptive driving routine but never really tried to diagnose if this was a fix.
I assumed it was a transmission issue. It is recommended to have it serviced every 40-50k miles (if I recall correctly) so I was actually planning on doing that anyways. I will let you know if this is a fix. The tranny service is approximately 400 bucks but there are DIY in the stickies.
Some mornings it is absolutely fine, and I never have this issue besides the mornings. I live in Arizona so its not particularly cold or anything.
If anyone has other ideas we are both listening
Also something to ask your friend, when I started noticing this issue, I also noticed my car was idling rougher in Gear. It idle's fine in nuetral and when start up, but at a stop light in first is is around 500 rpm and sounds almost like it wants to stall (never has though).
I have the EXACT same issue on my 2006 CLK500 with about 80k miles. Only in the mornings, sometimes when I go to pull out on the main road it just hesitates like it is about to stall and then it doesn't. This lasts for maybe 1 second total (which is long time at that point) and then continues normally.
I've also noticed it hanging in gear a little longer but I assumed that was just due to how my adaptive driving updates. I do the "sneaky ecu reset" which is simply just removing your adaptive driving routine but never really tried to diagnose if this was a fix.
I assumed it was a transmission issue. It is recommended to have it serviced every 40-50k miles (if I recall correctly) so I was actually planning on doing that anyways. I will let you know if this is a fix. The tranny service is approximately 400 bucks but there are DIY in the stickies.
Some mornings it is absolutely fine, and I never have this issue besides the mornings. I live in Arizona so its not particularly cold or anything.
If anyone has other ideas we are both listening
Also something to ask your friend, when I started noticing this issue, I also noticed my car was idling rougher in Gear. It idle's fine in nuetral and when start up, but at a stop light in first is is around 500 rpm and sounds almost like it wants to stall (never has though).
Super Member
Joined: Nov 2011
Posts: 586
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From: Arizona
e63 NA
About the techron, I would definitely recommend to use the approved Techron Fuel Concentrate. I use it every oil change and it is a great product. It will remedy some of the issues discussed but it won't eliminate them (at least in my experience)
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CLK55 W209, CL63 W216
Well if it's not a trans issue you might want to start with the basics. Give the throttle body and the maf sensor a cleaning especially at 80k miles. Sometimes that causes a rough idle.
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Joined: Nov 2011
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From: Arizona
e63 NA
For informational purposes to the OP, I've had my MAF checked out a few times, changed motor mounts, but never checked the throttle body. I would still check out the MAF but it wasn't directly related to my personal issue (which sounds the same as yours).
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Corrolla
Hows it going guys, were trying to figure out whats going on with my friends 04 CLK500. It just started this out of no where. In the mornings when going from a stop the car hesitates to go as if it wants to stall but it doesn't. its weird because it only does it in the morning for some reason, also I notice the car shifts really late to but once I turn the car off and turn it back on the shift problem goes away. Anyone know what would cause this? 04 CLK500 85k miles
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2004 CLK320
I had similar issue but not only at cold starts. Then the dealership replaced the MAF sensor and the issue went away.
It happened one more time after that but it went away by itself. I assumed it was bad gas
It happened one more time after that but it went away by itself. I assumed it was bad gas
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NO LONGER ACTIVE
There are some chronic hesitation problems with the M112/M113 engines. Unfortunately, MBZ has not found the cause, but some of us believe it's a problem in the vanes used in the intake manifold to vary the path length. It may not be that in this case because the hesitation issues are usually experienced in hot/humid weather - not cold.
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From: Wisconsin
2008 Mercedes Benz CL600
my 07 CLK550 was behaving oddly lately. not the exact same problem, but issues particularly in 1st/2nd that seemed transmission based. the cause was a leaking intake manifold that threw the ECU out of whack (flip flopping between running rich and lean). might want to check that
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From: Houston, TX
W209 CLK Renntech Widebody, C140 CL600 V12, AP2 S2000, NSX Twin Turbo, R8 V10
Hopefully it's intake related, clean or change the filter and clean the throttle body. If you can peek inside the intake manifold you should clean it and/or check for oil residue.
Hopefully it is not a compression problem in one of the cylinders but you can get a compression test done pretty cheaply if the problem persists. If your compression is low then that's a bad thing as you will need a new motor or a rebuild...
Obviously I would check your car's computer codes first to see if it reports anything-- it could be a lot of things. Intake, combustion, transmission problem could all cause "hesitation" so talk to a tech who can start eliminating the options.
Hopefully it is not a compression problem in one of the cylinders but you can get a compression test done pretty cheaply if the problem persists. If your compression is low then that's a bad thing as you will need a new motor or a rebuild...
Obviously I would check your car's computer codes first to see if it reports anything-- it could be a lot of things. Intake, combustion, transmission problem could all cause "hesitation" so talk to a tech who can start eliminating the options.
Last edited by Nero Tenebre; Feb 1, 2013 at 11:22 AM.
Thread Starter
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2010 Charger SRT8
Hey Bud,
I have the EXACT same issue on my 2006 CLK500 with about 80k miles. Only in the mornings, sometimes when I go to pull out on the main road it just hesitates like it is about to stall and then it doesn't. This lasts for maybe 1 second total (which is long time at that point) and then continues normally.
I've also noticed it hanging in gear a little longer but I assumed that was just due to how my adaptive driving updates. I do the "sneaky ecu reset" which is simply just removing your adaptive driving routine but never really tried to diagnose if this was a fix.
I assumed it was a transmission issue. It is recommended to have it serviced every 40-50k miles (if I recall correctly) so I was actually planning on doing that anyways. I will let you know if this is a fix. The tranny service is approximately 400 bucks but there are DIY in the stickies.
Some mornings it is absolutely fine, and I never have this issue besides the mornings. I live in Arizona so its not particularly cold or anything.
If anyone has other ideas we are both listening
Also something to ask your friend, when I started noticing this issue, I also noticed my car was idling rougher in Gear. It idle's fine in nuetral and when start up, but at a stop light in first is is around 500 rpm and sounds almost like it wants to stall (never has though).
I have the EXACT same issue on my 2006 CLK500 with about 80k miles. Only in the mornings, sometimes when I go to pull out on the main road it just hesitates like it is about to stall and then it doesn't. This lasts for maybe 1 second total (which is long time at that point) and then continues normally.
I've also noticed it hanging in gear a little longer but I assumed that was just due to how my adaptive driving updates. I do the "sneaky ecu reset" which is simply just removing your adaptive driving routine but never really tried to diagnose if this was a fix.
I assumed it was a transmission issue. It is recommended to have it serviced every 40-50k miles (if I recall correctly) so I was actually planning on doing that anyways. I will let you know if this is a fix. The tranny service is approximately 400 bucks but there are DIY in the stickies.
Some mornings it is absolutely fine, and I never have this issue besides the mornings. I live in Arizona so its not particularly cold or anything.
If anyone has other ideas we are both listening
Also something to ask your friend, when I started noticing this issue, I also noticed my car was idling rougher in Gear. It idle's fine in nuetral and when start up, but at a stop light in first is is around 500 rpm and sounds almost like it wants to stall (never has though).
Thread Starter
Junior Member
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2010 Charger SRT8
I was just about to ask that. I heard cleaning the MAF can fix the problem but not always.
Thread Starter
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2010 Charger SRT8
Did your friend actually start the car and go right away without waiting for the Temp to warm up ? Try this tell him to start the car then wait for like 1 mins and go after that see if its fixed....I mean in the morning. If it didnt fix go to Autozone and get one of those "CRC" Maf Cleaner then take your MAF sensor out to clean it.
and I know for sure she doesn't let the car warm up because I have seen her not do it. But I have it this week and I let it properly warm up and it still does it until its driven for a few minutes.
Thread Starter
Junior Member
Joined: Apr 2011
Posts: 29
Likes: 0
2010 Charger SRT8
Hopefully it's intake related, clean or change the filter and clean the throttle body. If you can peek inside the intake manifold you should clean it and/or check for oil residue.
Hopefully it is not a compression problem in one of the cylinders but you can get a compression test done pretty cheaply if the problem persists. If your compression is low then that's a bad thing as you will need a new motor or a rebuild...
Obviously I would check your car's computer codes first to see if it reports anything-- it could be a lot of things. Intake, combustion, transmission problem could all cause "hesitation" so talk to a tech who can start eliminating the options.
Hopefully it is not a compression problem in one of the cylinders but you can get a compression test done pretty cheaply if the problem persists. If your compression is low then that's a bad thing as you will need a new motor or a rebuild...
Obviously I would check your car's computer codes first to see if it reports anything-- it could be a lot of things. Intake, combustion, transmission problem could all cause "hesitation" so talk to a tech who can start eliminating the options.
Newbie
Joined: Feb 2016
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Clk500
I have the same thing going on with mines and I have a clk500 2004.
I live in Pennsylvania and my car been sitting in the garage for about 3 weeks. That's good they came and I pulled it out and it did the same thing I'm thinking that it has something to do with the cold because it has been very cold here these past couple of weeks
