Low idle?
Thread Starter
Member
Joined: Mar 2010
Posts: 215
Likes: 0
1994 E220 Coupe
Low idle?
Hi,
I have a 94 model E220 Coupe which seems to be idling low.
I don't remember it being like that all the time, though I can be wrong. Also, when I noticed this I noticed the car idle really bad, and now the idle is somewhat better but still not very good (in D, in P it idles fine). I know the engine mounts are gone, but should it be idling this low?
Also, the gearbox sometimes feels smoother/rougher than other times. Could the low idle be gearbox related? (4 speed auto)
The car has 60,000 miles, owned since new and is very well maintained.
I have a 94 model E220 Coupe which seems to be idling low.
I don't remember it being like that all the time, though I can be wrong. Also, when I noticed this I noticed the car idle really bad, and now the idle is somewhat better but still not very good (in D, in P it idles fine). I know the engine mounts are gone, but should it be idling this low?
Also, the gearbox sometimes feels smoother/rougher than other times. Could the low idle be gearbox related? (4 speed auto)
The car has 60,000 miles, owned since new and is very well maintained.
MBWorld Fanatic!
Joined: Jun 2006
Posts: 4,968
Likes: 3
1990 300ce 24v I6
In P/N it is going to idle closer to the specced 750ish RPM. In drive, with drag from the transmission it is going to idle a bit lower. It looks almost exactly the same as my m104 300ce.
I think you are okay with the idle.
Can you describe the gearbox issue better?
I think you are okay with the idle.
Can you describe the gearbox issue better?
Thread Starter
Member
Joined: Mar 2010
Posts: 215
Likes: 0
1994 E220 Coupe
The gearbox, it would always shift fairly harshly, and then all of a sudden the shifts became a lot smoother. Vacuum lines were checked and were ok, also the modulator was ok.
Another issue with the gearbox is that it jerks when it goes into D or R
Another issue with the gearbox is that it jerks when it goes into D or R
MBWorld Fanatic!
Joined: Jun 2006
Posts: 4,968
Likes: 3
1990 300ce 24v I6
Harshly between which gears? On mine its between 2-3 but there is an updated spring kit I can buy to fix that issue.
I flushed my trans and replaced the fluid/filter and its much smoother overall now.
If it is getting rough when going to D/R you could need to have it adjusted or rebuilt.
I flushed my trans and replaced the fluid/filter and its much smoother overall now.
If it is getting rough when going to D/R you could need to have it adjusted or rebuilt.
Thread Starter
Member
Joined: Mar 2010
Posts: 215
Likes: 0
1994 E220 Coupe
1st to 2nd is the harshest, 2nd to 3rd is smoother and 3rd to 4th is smoother still.
They shifts are not very harsh, just not seem-less like the newer cars. I guess these autos were never the smoothest of shifting?
My gearbox was also flushed recently.
The car has only 60,000 miles. You think there is a chance it may need a rebuild?
Also, what adjustment do you mean?
They shifts are not very harsh, just not seem-less like the newer cars. I guess these autos were never the smoothest of shifting?
My gearbox was also flushed recently.
The car has only 60,000 miles. You think there is a chance it may need a rebuild?
Also, what adjustment do you mean?
Junior Member
Joined: Feb 2007
Posts: 61
Likes: 0
From: Coloradoo
1991 300E
Your idle speed is completely normal. These cars idle lower than most other cars you have probably driven. Engine mounts contribute significantly to rough idle, which is why you might feel there is a problem......
These transmissions are supposed to have a little kick to them. I wouldn't call it not smooth at all, just different. They shift under full load as opposed to most automatic "slush-boxes". As long as it's not flaring or slipping at higher rpm shifts, you're fine.
These transmissions are supposed to have a little kick to them. I wouldn't call it not smooth at all, just different. They shift under full load as opposed to most automatic "slush-boxes". As long as it's not flaring or slipping at higher rpm shifts, you're fine.
Trending Topics
MBWorld Fanatic!
Joined: Jun 2006
Posts: 4,968
Likes: 3
1990 300ce 24v I6
Here are the shots of where my engine tachs at idle in D and N respectively.
I think you are describing the normal behavior of the trans in these cars. I'd have to film my tach while i drive to make sure that you're experiencing the same thing as I, but maybe I can do it a bit later.
I know that there is a cable or valve that can be adjusted on the trans that can determine how much kick the shifts have. I rather like the kick actually. These engines have a nice pull to them once they get going
I think you are describing the normal behavior of the trans in these cars. I'd have to film my tach while i drive to make sure that you're experiencing the same thing as I, but maybe I can do it a bit later.
I know that there is a cable or valve that can be adjusted on the trans that can determine how much kick the shifts have. I rather like the kick actually. These engines have a nice pull to them once they get going
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
Magnificent New Mercedes-Maybach S-Class Revealed: 12 Things to Know
Verdad Gallardo
Thread Starter
Member
Joined: Mar 2010
Posts: 215
Likes: 0
1994 E220 Coupe
Our gearboxes should be different though, mine being only 2.2 4 cylinder engine.
Do you have a 4 or 5 speed?
I think my car idle slightly higher in P and N than yours.
Also, when in P or N, I notice the tacho needle moving ever so slightly, does this mean the car is missing or something?
Do you have a 4 or 5 speed?
I think my car idle slightly higher in P and N than yours.
Also, when in P or N, I notice the tacho needle moving ever so slightly, does this mean the car is missing or something?
Thread Starter
Member
Joined: Mar 2010
Posts: 215
Likes: 0
1994 E220 Coupe
In D the car idles pretty rough, in R it idles better, and in P it's fairly smooth but you can feel the tiniest bit of surging as the needle moves up and down.
It moves very slightly though, I am guessing something in the vicinity of 30-40rpm or so in total
It moves very slightly though, I am guessing something in the vicinity of 30-40rpm or so in total
