please advise what in what years the m114e engine was used in the 250ce and what type of fuel injection was used on this engine,i.e., mechanical or electronic? my guess is the engine used from 1968-71 was a 114.980 but i do not have a clue regarding the fuel injection. i am also aware the car was not sold in the u. s. i currently own a 71 carburated 250c and am toying with the idea of switching over to a fuel injection based power plant. any help you can provide regarding the m114e engine will be greatly appreciated.
bohemianboy

visit the vintage forum. There's a live thread by user JiveTurkey about his 250E restoration.

The motor was called an M114E, which is a D-jet fuel injected version of the 2.5l M114V (carbed) motor. To turn one motor into the other, swap the head and then find all the intake and fuel parts.

Far easier is to find an M123 manifold. That's the 2.5l motor introduced in 1977 along with the W123 chassis cars. Finding that will be very difficult. But if you do find one, you can use a simple rochester 4bbl carb or a tbi setup from a chevy.

Another manifold possibility is the unimog manifold from an M180 motor. There are some varients of these venerable straight 6 motors that had a single carb. I've never seen one, so I'm not sure what the base looks like. Probably similar to what you have now, but a single flange instead of two.

Having gone past your exotic options, You could, in theory try two throttle bodies with a megasquirt controller. Search the forum for other megasquirt combinations. They're there.

Thx -CTH

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Are you sure you don't have an M130? Wikipedia indicates that the coupes all got the M130, but their information in that area is a little suspect, since the page has a table listing the 114.011 (of which I have one) not going into production until 1972. Mine's a 1971 model with a January 1971 build date.

Linky: http://en.wikipedia.org/wiki/Mercedes-Benz_W114

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

that wiki page has more errors than an early Mets game.

The 250/8 had a model break in mid 1971 where they stopped using the M114 motors and switched to the same M130 as in the 280 models. This applied to both the coupe and sedan.

Also, they didn't make the 250/8 after the 1972 model year.

-CTH

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If you want to go for a later engine, I have a fuel injected 2.8 M110 engine from a Euro 280SL gathering dust in the back of my garage.

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With best regards

Al

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I think in England they kept up 250 C / CE sales until 74ish. Thats from the rusty back section of my brain though, I've had a bit to drink after a 10 hour day in 27 degree weather.

I stared at this for almost an hour. It's sublime. I feel like I owe you money now.

Hi, I'm JiveTurkey. If you need pictures of how anything is set up on Wilma feel free to ask. I'll help you out however I can dude. Also, if you do manage to do a Bosch D-jet swap to fuel injection there will officially be enough of us on here (two is enough right?) to start a super (I'd use "uber" but I can't make the U with the dots over it.) exclusive 250CE owners club. There will be beer. Possibly chicks. Groovy times will ensue. Boy, I'm a little off track...

Sidenote; Cth, have you still got those window and sunroof switches?No pressing need for them, just reminding you.

dang you're right. I owe you a set of switches. Sorry about that. -CTH

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oh, and that's nitske's book. It's a good source of incorrect model info.

However, in this case, it might well be right. I just dug out the 1974 Technical Data Manual and it indicates that the 250 and 250C were "current" in 1974.

-CTH

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Take your time sir, I'm a long way from needing those switches on a regular basis.

Hello,

Yes that electronic fuel injected motor is the best powerplant used in those W114 coupes and sedans. Very scarce over here. I owned both the carb version and the "E"version. The "E" is a pleasure to own, perfect hot or cold starts, excellent warm and cold idle, good power, no hesitations, stays in tune. Mercedes replaced this with the M110 double overhead cam injected engine which had only a bit more horsepower, a lot more complication and lot more weight than this "E" motor. ?

I also put many mechanically injected 280SE engines in these W114 coupes and sedans. These M130 injected engines had even more horsepower than the "E" eninge. Turns these cars into AMG style performers. Zero to sixty times of 6 seconds if you pull a little weight off also. Used one to rally years ago. (Chuck's new engine).

Anyway if you do find a "E" engine your biggest challenge would be to transplant the complex wiring harness and brain box to run the electronic injection.

These days if I were doing a transplant, I would use the simple and light M103 engine out of the W124 cars (300E). Lots more power, less weight and simple (single overhead cam six over 200hp). In addition these powerplants are plentiful in the wrecking yards.

__________________
Joe Alexander
Blacklick, Ohio
1964 220SE Rally (La Carrera Panamericana someday)
1966 Unimog 404s (Swedish Army)
1969 300SEL 6.3 (sold)
1969 280SL Pagoda
1973 280SEL 4.5
1974 450SLC FIA Rally car (standard trans)
1982 300D turbo (winter driver)
1986 560SEC
1989 Unimog FLU419 (US Army)
1991 300TE (wife)
2002 SLK 32 AMG (350 hp)

Just a thought. I've often thought about what my W114 would do with a 5.0 HO Ford/T5 swap in it. I think it would be a riot to drive.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.