I have a 1969 280S that i am rebuilding from A to Z.
Now the car have no engine and i am considering fitting in it the 280S from 1973 and i would like to know if anyone knows if it fits and what modifications should i do.
I am planning to switch to the 1973 280S engine with its automatic transmission and Air conditionner...the car was manual with no AC

M110 with d-jet fuel injection(electronic one). It will be easy to install and your car had manual 'box, you have to acquire the floor auto shift lever and linkage rods from donor car,
why not go for manual?

Or you could put the Nissan L28D six banger diesel in there with manual or Auto!

Peice of cake.

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Mercedes 250s 1967 (W108) All the car you could ever need

The M110 would be a drop in replacement. It's essentially an M130 block with a DOHC head. If you can find a manual and all the clutch stuff, it would bolt right in.

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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

You say a 280S? Is that a carbureted M110 engine? . Look for a 1980 280SE (M110 with Kjet fuel inection) ,there should be plenty of good used engines in canada, buy a complete car and use it as donor car. swap the engine and auto trans into your car. Bolt's in with no fuss. Air con for a 108 is easy but most conversions are at least 30 years old. Depending on how much money you want to spend,fitting aircon is very simple for a basic system .

the original engine was a twin cam carburated M130 but i got the car with no engine. I am trying to swap to automatic and to the M110 280SE engine 1979 or 1980.
It seems i have to do a little modifications to the motor mounts bases and then the M110 will fit

I once had a 280S, still regretting that a sold it

m130 is a single over head cam

Going from from "S" to "SE" can be a bit more tricky that it sounds! First the "S" lacks all of the fuel injection gizmo's like fuel pumps, electronic wires, relays, return fuel line and so forth.

Further going from auto to manual tranny will require a auto prop shaft from another w108 280SE or S.

And don't underestimate all the little stuff that has to be custom made when switching from m130 to m110. Stuff like exhaust pipe, throttle linkage.

Last IMHO a 280SE/S with a manual tranny is much much nicer.....

/C

i am not really considering getting an engine with injection. I prefer to get one "S" which is carburated. One of the shops just told me that he might have a 108 280S engine with its manual transmission still on. I will have to go check it out next week.
If i will be able to find original ones,,,i will switch for an automatic gearbox and i will get an AC. If not....its gonna be manual with no AC

Wall,ever driven a manual W108? a automatic is better. But that being said,the swap to M110 is simply a matter of bolting the W108 mount arms to thew block. Radiator from the W108 bolts into place using the same hoses,and make sure you have a trans cooler type radiator .
tHE kJET injection doesn't have electronics in 1982. The only electrical connection needed is a power feed for the Warm up regulator which has a circuit involving the cold start valve and the water and air sensors. All are in the same circuit. Just unplug the wires from the donor car. So simple it's 'laughable.
The W126 fuel pump with filter and accumulator bolts up under the car in front of the fuel tank using the existing holes,replace the rubber hoses while you are there!. Fuel feed and return are the same size as the W126 so there is no need to replace the fuel pipes. On the front end just get the W126 front steel fuel lines and the rubber hoses adapted to the existing steel lines. In fact some have a join coupling just below thew fire wall. The w126 pipes can be connected there.
The power supply from the W108 is identical to the W126 so just connect thew m110 to the same circuit that already exists alternator ,starter etc .If you use the W126's alternator,just disconnect the regulator,connect the fat lead to the battery and the blue lead to the small terminal and you are ready to charge.
The W108 and W126 have the same front shaft ,although there are 4 different lengths. Just get the W126 front shaft and slide it into place.
You can even bolt the W126 shifter to the W108 floor where the original shifter came through.

Use the W126 master cylinder ,calipers and front rotors on the W108 hubs. The rear discs and calipers are identical to the W126 so there is no need to swap components.
You will need better brakes to cope with the extra urge..

All this points to one thing,mercedes parts interchange across several models ,unlike dropping an off brand engine in which requires hours of swapping and fabricating,the M110 into the W108 is easy,cheap and has more advantages than messing about with a worn out M130. You will be happy with the result!.

k-jet is good to go but d-jet is excellent especially if you're going to install modern (computerized) fuel injection e.g. megasquirt,FAST,ACCEL,etc... but since you like the big 4-barreled carby M110, you better get hold of the repair manual because Solex 4A is very complicated to some guys, especially you're used to twin carbed M130's, tuning 4A's is very different from twin carbs.

Djet? djet and computor is almost oxymoronic,theres no computor in a Djet system,it's simply an electronic switching box without any capacity to diagnose fuel requirements,the MAP sensor does that along with the TPS. . A m110 with a Djet would be 30+ years old now.

D-jet was in the 1960ies. I once had a 1972 280ce that was D-jet...
Im pretty sure i wont run any computerised fuel injection.
I will stick with one of the basic two options, first trying to get the original engine M108 if not swap to M110 (1980).
Dealing with the 4A solex is fine for me, i got a specialist that will be more than happy to help doing it. But as mercmad is telling, if the switch to K-jet is that easy, i would consider that too

mercmad, yes i have driven a couple manual 280S w108(not very uncommon in Sweden), have you?
A stick shift is definitely better, but then I grew up with stick shifts....

Mercmad, great info that you can use w126 calipers and front rotors on the W108 hubs.....

Chlippo it will be a nice little project to switch engines. Its sure is easy but its a long TO DO list with easy stuff

/C

We had a brand new 280 SE W108 manual in 1972. 180,000 miles in 18 months, It was our company car. The family car was brand new W114 280 E manual followed by a 230-6 manual both cars covered close to 50,000 in 3 years , so yes I have driven many manual transmission mercedes over the the last 40 years and I still think they drive like crap. . Mercedes has sold 99% automatic cars since 1958 so there is a consesus view that the manual trans cars are not paticularly good value. I sell a few mercedes as a side line and manual cars are only coveted by those have 1/never driven one for any length of time,and 2/ think they are buying some sort of sports version because it is manual trans.



It's about two days work..Quicker if you have done it before. longer if you pay someone else to do it..

I guess all of that 1% went to Sweden then.....
Hardest part is to decide which category I belong to 1 or 2, I guess it must be 2! I do feel kinda sporty in a w115 220D with a stick Mercmad you sure are funny

Changing engine, changing transmission(auto to man), installing injection system and installing AC on an old car with rusty and seized bolts and all kind of surprises.
2days Think not....

I'm out of here...