Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-10-2003, 10:14 AM
Registered User
 
Join Date: Jan 2002
Location: England
Posts: 1,841
300-24v vs 320

Hi guys

Still thinking about spending some money, I'm interested in the differences between the 300CE-24v and 320CE. Are the engines the only difference? If so how are they different. I'm in the UK, do I get more than the 220bhp in both I believe there is?

Are they both M104 engines, and if so, how many valves is the 320CE and why did they do this change?


later

Russ

__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
Reply With Quote
  #2  
Old 02-10-2003, 11:39 AM
Registered User
 
Join Date: Apr 2002
Posts: 139
i prefer the 24 valve straight six. v6's suck.
__________________
g-wagen
Reply With Quote
  #3  
Old 02-10-2003, 06:10 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Tryan - The M104 3.2 liter engine was a straight six engine from 1993-1995 in the W124 chassis '93 300E (3.2) / '94-'95 E320, from 1996-1997 in the W210 chassis E320, and from 1991-1999 in the W140 chassis S320.

The 3.0 liter-24 valve M104 engine is an early version of the 24-valve DOHC 3.2 liter M104 engine used from 1993-on. The 3.0 liter version still used the CIS-E fuel injection system, using a distributor with one coil wire and 6 spark plug wires. This is basically a mechanical injection system with electronic control.

The "modern" 3.2 liter M104 engine was used in all U.S. 1993 and later 300E (3.2)'s, 300CE's, 300E Cabriolet's, 300TE wagon's, and '94-'95 E320's. Note that all 1993 300E / CE / TE's are misbadged as the engine is a 3.2 liter engine. The badging error was corrected starting in all 1994 models, but only the logisticians at Mercedes have the answer for this one.

The 3.2 liter M104 engine uses a different ignition system - HFM (hot-film mass air flow sensor), fully electronic with integrated electronic ignition and sequential fuel injection. This system combines fuel injection and ignition control in one module. HFM-SFI systems use coils that are mounted directly on the spark plugs, replacing the distributor at the front of the engine. Each coil pack provides spark to two spark plugs at the same time, one connected directly to one plug, and the other with a short high tension lead to the next spark plug. So there are 3 coil wires and 3 high tension lead wires.

HFM fuel injection systems are designed so that idle speed can't be adjusted. Idle speed is completely controlled electronically. This HFM injection system also has adaptive technology that compensates for conditions such as engine wear and unmeasured intake air and is designed to maintain driveability as the engine ages.

HFM-SFI can retard engine knocking to just the knocking cylinders, unlike EZL technology, which retards spark timing across the entire engine. This keeps the ignition timing point as advanced as possible for maximum power output.

The 3.2 liter M104 engines also have variable valve timing on the intake cam, making the torque curve broad and flat, developing HP at a much lower rpm. This makes the power much more useable and noticeable.

The early 3.0 liter 24 valve M104 engines are nice, but the advancement of technology is just so great in the 3.2 liter M104 engine, that if all possible, go with the newer engine.
__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Last edited by suginami; 02-22-2003 at 02:06 PM.
Reply With Quote
  #4  
Old 02-10-2003, 06:58 PM
Registered User
 
Join Date: Jan 2000
Location: Fl
Posts: 140
tryan, why do they suck?

Any valid support for this
__________________
'02 C240
'00 LR Discovery
'72 280SE
'67 280SL

---past---

'79 280E sold (RIP)
'86 300E sold
'87 300SDL sold
'90 Laforza sold
'95 320SE sold
'98 ML 320 (sold)
Reply With Quote
  #5  
Old 02-10-2003, 07:15 PM
Registered User
 
Join Date: Aug 1999
Location: ajax, ontario, canada
Posts: 773
Note that some of the 1993 300E cars had the 2.8li M104, and were therefore badged 300E 2.8, as a logical replacement of the (M103) 300E 2.6.

I personally prefer the inline-6 to the V6, since they are inherently balanced and have a smoother exhaust sound. Too bad MB abandoned them.
Reply With Quote
  #6  
Old 02-10-2003, 08:11 PM
Registered User
 
Join Date: Apr 2002
Posts: 139
thanks for the education suginami. from your post the 3.2 sounds smarter. i get to 'borrow' a 93 e once in a while and i love the motor in that car.

the v6 motor in the 99 wagon vibrated a little at idle. the 90 bank angle was a compromise to minimize tooling costs and the balance shaft just did not get it in my book. the secondary harmonics where quite obvious when you got on it. i will never get another car with a v6. they suck fuel like an 8 banger and have 4 cylinder power.

(plus the balancer fell off on mine, but i think the soft rev-limiter on the newer models will cure that woe.)

the torque specs for the v6 compare favorably to the straight six, but the seat of the pants dyno tells a different story.
__________________
g-wagen
Reply With Quote
  #7  
Old 02-10-2003, 09:37 PM
A. Rosich's Avatar
Registered User
 
Join Date: Nov 1999
Location: San Jose, Costa Rica
Posts: 883
300CE-24 vs E320C

I could be wrong, but I think the ORIGINAL post (from Russ) asked about the difference between the 3.0 liter 6-cyl 24 valve inlineengine and the 3.2 6-cyl inline 24-valve.

The 3.0 liter 6-cyl inline 24-valve (300E-24, 300TE-24, 300CE-24) was installed in the sedan, wagon, coupe and cabriolet around the late 92 to the late 93 production run on the models sited.

The M104 3.2 inline (not V-6) liter 6-cyl. 24-valve suplanted that engine from early 94 on.

There specifications are:

300E-24 / E320

Number of cylinders: 6 / 6
Bore x Stroke: 88,5/80,2 / 89,9/84,0
Total Displacement : 2,960 c.c. / 3,199 c.c.
Horsepower: 220 hp @ 6400 rpm / 220 hp @ 5500
Torque: 265 Nm / 310 Nm
Alternator: 14 V / 110 Amp -/-14 V / 90 amp
Battery: 12 V / 92 Ah -/- 12 V / 62 Ah

The 3.0 liter 24 valve was Mercedes "test run engine" for a multivalve power unit. This specific unit turned out to be as many Mercedes mechanics will say: "ALL noise - NO go".

As you can see, the 3.2 liter later on added more torque, and although they both had the same horsepower, it will reach peak power at less r.p.m.

I drove a 300CE-24 cabriolet for many months and I definitely remember the "all noise - no go" quality of the engine. When pressed hard, it will scream out like a cat mating, but the cabriolet would barely move from the standpoint. On the other hand, my E320T has a very nice pick up.

I have also heard some mechanics as referring to the "reliability" of the 3.0 liter 24 valve as "so-so", compared to a "very good" for the 3.2 liter 24-valve.
__________________
A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]
Reply With Quote
  #8  
Old 02-10-2003, 10:07 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Re: 300CE-24 vs E320C

Quote:
Originally posted by A. Rosich
I could be wrong, but I think the ORIGINAL post (from Russ) asked about the difference between the 3.0 liter 6-cyl 24 valve inlineengine and the 3.2 6-cyl inline 24-valve.

The 3.0 liter 6-cyl inline 24-valve (300E-24, 300TE-24, 300CE-24) was installed in the sedan, wagon, coupe and cabriolet around the late 92 to the late 93 production run on the models sited.

The M104 3.2 inline (not V-6) liter 6-cyl. 24-valve suplanted that engine from early 94 on.

Excellent post, but in U.S. models, the early 3.0 liter 24 valve M104 engine was last used in model year 1992 models in W124's.

Model Year 1993 300E's have the new 3.2 liter or 2.8 liter M104 engine.
Those with the 2.8 liter M104 engine are badged 300E 2.8.
Those with the 3.2 liter M104 engine are badged 300E. The genius marketing people opted to not call this a 320E (as in the rest of the world), 300E 3.2 (to follow the U.S. pattern), or even E320.
__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
Reply With Quote
  #9  
Old 02-11-2003, 04:35 AM
Registered User
 
Join Date: Jan 2003
Location: Epsom Downs, England
Posts: 152
Pentoman,

I drove a lot of 12v, 24V 3 litre and 24V 3.2 litre versions of the 300CE when I was looking to buy one.

There is no doubt in my mind that, good as the earlier versions are, the 3.2 litre engine is the one to go for.

It is MUCH faster (seat of the pants) , smoother and quieter and doesn't seem to be any thirstier......a win, win, win situation.

It's your money, but I'd want an earlier-engined E-series to be priced much lower to compensate for all that lost performance.
__________________
Paul Gibbons
'93 320CE
'73 Jensen Interceptor (Resting)
Giant Full Sus Mountain Bike
Reply With Quote
  #10  
Old 02-11-2003, 08:13 PM
Registered User
 
Join Date: Jan 2002
Location: England
Posts: 1,841
Smile Thanks everyone

Thanks to all you guys, this is the advice I needed, technical info backed up by real-life impressions. I was erring towards the 300-24v before.. not sure why. But I will definitely go for the torquier 320 now (I love the torquey nature of my 190E's 2.0).

Of course, this is all if I can't find a 500E...
__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
Reply With Quote
  #11  
Old 02-11-2003, 08:57 PM
A. Rosich's Avatar
Registered User
 
Join Date: Nov 1999
Location: San Jose, Costa Rica
Posts: 883
To extend on Mr. Gibbons thoughts: I have heard many people that would rather buy a 300E (the regular 12-valve 6-cyl.) over the 300E-24. Or, if your budget allows it, go all the way up to the E320.
__________________
A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]
Reply With Quote
  #12  
Old 02-11-2003, 09:19 PM
Registered User
 
Join Date: Aug 2002
Location: So Cal, Beach
Posts: 250
Hey Russ, I have a 1990 300ce, with the M104, I love it!

Yes, the torque curve is not the same but, still pulls strong to 7000 rmp .

Remember these 3.0 M104's start in second gear thats why they seem sluggish, but Power Brake one just a little and nail the throttle, it will smoke the tires! Sometimes when I hammer it down into first gear, hit 7000, the tires chirp going into second.

My car has 130,000 and still drives like new. From what I have learned from this forum and my Tech, the 3.0 is GOOD, less to go wrong.

It's all good!

Russ, thanks for the tip's on the digital camera, I think I am getting the hang of it.

__________________
Tim
300CE
280SE 4.5
Sandals (size 11)
Reply With Quote
  #13  
Old 05-05-2006, 10:15 PM
Registered User
 
Join Date: Jan 2006
Posts: 13
300-24

hello, i have a cis 300-24 170.000 km runs like hell, iīve tested it with 320 clk and no comparison clk "much a do about...
Perhaps differential and transmission, donīt know 320 specs about this.
Remember to overhaul the fuel distributor (new diaphragm!), iīve done this to mine 6 months ago and itīs like new.
Enzo
Reply With Quote
  #14  
Old 05-06-2006, 02:07 AM
Registered User
 
Join Date: Jun 2001
Location: Canada
Posts: 219
Quote:
I drove a 300CE-24 cabriolet for many months and I definitely remember the "all noise - no go" quality of the engine. When pressed hard, it will scream out like a cat mating, but the cabriolet would barely move from the standpoint. On the other hand, my E320T has a very nice pick up.
If memory serves, the cabriolet is also about 500 lbs heavier than the coupe / sedan. That's a sizeable weight to carry around all the time. Then again, someone who drives a Civic or similar car will say any E-Class is too heavy.

No doubt the cabriolet is a very elegant looking model.

Last edited by Impala; 05-06-2006 at 02:15 AM.
Reply With Quote
  #15  
Old 05-08-2006, 12:51 PM
Registered User
 
Join Date: Jun 2005
Location: UK
Posts: 66
Since you're in the UK the 300CE-24 non cat is the one to go for.
The cat was optional up to 1993 and without it you get 230bhp and a lighter and simpler engine. You'll also avoid the wiring problems of the 320.

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 02:27 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page