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1991 Mercedes 190E 2.6
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Discussion Starter #1 (Edited)
Hello all.

When driving and stick shift is at "D", I noticed the trans up-shift only two times. Is that mean my transmission is a three-speed transmission? See attached pic.

Also, the speed meter shows 3 shift points: I, II, and III See attached pic.

Is that mean 3rd gear shift to 4th when it reaches 140+ km/h?


I've only had my car for about 4 months and really don't know much about it yet.
 

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1984 190D 2.2
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It's a four speed, it just starts off in second gear.

Not sure what those marks are for. That's way high to be shifting into fourth gear though. I could get mine to shift into fourth at around 25 mph if I was accelerating slowly.
 

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92 190E 2.6
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When at a complete stop, if you put the gear selector down into ''2'' and then back to ''D'' it will make the transmission start in first. You can also change the K1 spring to make it always start in 1st. some 91 models, and all 92 & 93 have a fist gear start from the factory
 

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'87 190E 2.3 Manual, '81 500SEL 4whl SLS, '91 300SEL
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It's a four speed, it just starts off in second gear.

Not sure what those marks are for. That's way high to be shifting into fourth gear though. I could get mine to shift into fourth at around 25 mph if I was accelerating slowly.
Those marks are "max speed" for the indicated gear. Good visual aid so you don't try to shift into 2nd above 55 mph. :p

When at a complete stop, if you put the gear selector down into ''2'' and then back to ''D'' it will make the transmission start in first. You can also change the K1 spring to make it always start in 1st. some 91 models, and all 92 & 93 have a fist gear start from the factory
Also, putting it in "2" from a dead stop (or < 3 mph, about) will make it hold 1st gear until:
- You hit the red-line and it shifts into second or
- You shift into "3" while not at WOT.

I like to use this method to "manually" shift, by holding 1st until whatever speed my heart desires, then shifting into "3" then back to "2" to make it hold 2nd gear.
 

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92 190E 2.6
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I like to use this method to "manually" shift, by holding 1st until whatever speed my heart desires, then shifting into "3" then back to "2" to make it hold 2nd gear.
I like to do that too, it makes my 2.3 bearable to drive after being used to having 2.6's for 7 years, lol
 

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1991 Mercedes 190E 2.6
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Discussion Starter #6
Those marks are "max speed" for the indicated gear. Good visual aid so you don't try to shift into 2nd above 55 mph. :p
So, you can be running on third gear up to 85 mp/h? At what RPM are you on at this point? I'm still a bit confused... :)
 

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1991 Mercedes 190E 2.6
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Discussion Starter #7
It's a four speed, it just starts off in second gear.

Not sure what those marks are for. That's way high to be shifting into fourth gear though. I could get mine to shift into fourth at around 25 mph if I was accelerating slowly.
Ok, so if mine starts at 2nd(D) and up-shift only two times from D, that would make sense that it's 4 speed. It just seems strange that at 60mp/h, my RPM is revving at 3000.
 

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92 190E 2.6
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Ok, so if mine starts at 2nd(D) and up-shift only two times from D, that would make sense that it's 4 speed. It just seems strange that at 60mp/h, my RPM is revving at 3000.
3k @ 60mph is perfectly normal. That's because our cars do not have over drive, fourth gear is a 1:1 ratio. Most automatic 190's sit at between 3000-3500 RPM on the hwy. A few of us are lucky enough to have differentials that are geared more for hwy travel.
 

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1991 Mercedes 190E 2.6
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Discussion Starter #9
3k @ 60mph is perfectly normal. That's because our cars do not have over drive, fourth gear is a 1:1 ratio. Most automatic 190's sit at between 3000-3500 RPM on the hwy. A few of us are lucky enough to have differentials that are geared more for hwy travel.
Good info, thanks!
 

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1992 190E 2.3 8v w/ '87 5-speed and 3.27 rear, 1966 Shelby Cobra 427 S/C, 2018 Triumph Bonneville
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I did an auto>5speed conversion on my '92 2.3. I had the 2.85 automatic rear with the 5-speed manual for a little bit and I'd have 2000 RPM @ 65 mph. Too tall for the 2.3 but it would probably be ok with the 2.6. I now have the '87 3.27 rear and I'm running about 2300 rpm @ 65 mph.

No AC, light load, all highway driving, 34-35 mpg is the norm!
 

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1991 Mercedes 190E 2.6
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Discussion Starter #11
I did an auto>5speed conversion on my '92 2.3. I had the 2.85 automatic rear with the 5-speed manual for a little bit and I'd have 2000 RPM @ 65 mph. Too tall for the 2.3 but it would probably be ok with the 2.6. I now have the '87 3.27 rear and I'm running about 2300 rpm @ 65 mph.

No AC, light load, all highway driving, 34-35 mpg is the norm!
That's what I'd call the BFG in performance tuning. :thumbsup:
 

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1992 190E 2.3 8v w/ '87 5-speed and 3.27 rear, 1966 Shelby Cobra 427 S/C, 2018 Triumph Bonneville
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[/QUOTE]That's what I'd call the BFG in performance tuning. :thumbsup:[/QUOTE]

Well I have either: crappy fuel injectors, or a bad fuel pressure regulator. I have a high throttle flat spot and it has "lean surging". My 0-60 is about 14 seconds. I swear I'm missing at least 30 hp.

Back to your engine/transmission. You can find a later (90-93) trans, and do a swap to get the 1st gear start (is that really worth it?) or change the K1 piston/valve thingy (sorry, I don't know much about it). Yes those, dots on your speedo are the "top speed" in their respective gear. 3K @ 65mph is fine, but 2300-2500 would be best. ESPECIALLY for the 2.6!!
 

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1991 Mercedes 190E 2.6
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Discussion Starter #13
You can find a later (90-93) trans, and do a swap to get the 1st gear start (is that really worth it?) or change the K1 piston/valve thingy (sorry, I don't know much about it). Yes those, dots on your speedo are the "top speed" in their respective gear. 3K @ 65mph is fine, but 2300-2500 would be best. ESPECIALLY for the 2.6!!
Trans swap just for 1st gear not worth the tons of work. I'll get used to the high rpms, eventually. :)
 

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1992 190E 2.3 8v w/ '87 5-speed and 3.27 rear, 1966 Shelby Cobra 427 S/C, 2018 Triumph Bonneville
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Trans swap just for 1st gear not worth the tons of work. I'll get used to the high rpms, eventually. :)
I agree the trans swap isn't worth it. But the K1 spring thingy is. How about a taller rear? I'm pretty sure most pre-91 (ish) 190s had a 3.27 or 3.23 rear ratio. The later automatics had 2.85 rears. The later cars has different stub axles (and different length half-shafts), but they are pretty easy to swap. I did it in under an hour. Just make sure the shims (you'll see what I'm talking about) are the right thickness. I was able to take the '92 stub axles and put them in my '87 rear while using the shims from the '87 rear. I have a 3.27 rear because the 2.85 is too tall for the 5-speed and the 2.3.
 

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1986 190e 2.3 8v
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can i verify the gears by part #? i have a '93 2.6 parts car that i was thinking about getting that rear end in my '86 2.3........will it be an improvement? slower take off and better highway mileage?
 

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1992 190E 2.3 8v w/ '87 5-speed and 3.27 rear, 1966 Shelby Cobra 427 S/C, 2018 Triumph Bonneville
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can i verify the gears by part #? i have a '93 2.6 parts car that i was thinking about getting that rear end in my '86 2.3........will it be an improvement? slower take off and better highway mileage?
The '93 2.6 auto should have a 2.85 rear. When looking under the car, from teh rear, there will be a "tab" (more like a growth) on the right side/bottom of the rear by the cover. On that tab/growth thingy, there should be a trio of number designating the rear ratio. You might need to clean it.

It will give you a slower takeoff, but the increase in MPGs is worth it.
 

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'87 190E 2.3 Manual, '81 500SEL 4whl SLS, '91 300SEL
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So, you can be running on third gear up to 85 mp/h? At what RPM are you on at this point? I'm still a bit confused... :)
You would be at the red line.

can i verify the gears by part #? i have a '93 2.6 parts car that i was thinking about getting that rear end in my '86 2.3........will it be an improvement? slower take off and better highway mileage?
You should definitely do the K1 spring trick to get first gear start if you switch to a lower ratio differential, in my opinion. With the stock diff in my 2.3 and a first gear start transmission, 1st gear is way too short, but 2nd would last way too long and be "pep-less," in my opinion.
 
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