and it will surely be a turbo charger configeration not supercharger; very different.
It is the EVO version of the old 271 engine (which had all the timing chain and sprockets problem) but which seems to have been solved with this engine. The timing chain in this engine is a newly developed...
IF inline 6 it is usually the coil extenders down to the plugs that go open circuit when hot. Inside the rubber is a 2k ohm wire which gets brittle and really should be replaced when plugs changed to avoid future problems. These extenders are pulled hard from plugs when changing and starts the...
change the lambda sensor, they do degrade over time and get sluggish.
also ensure the coolant temp sensor (for ECU) is spot on, or simply change it as they are cheap.
When I changed both those items on my E320 (95 124) fuel economy increased by approx. 16%
Sorry if I misled you with 'straight swap' comment.
In the rush of life I clearly did not read your post properly.
I do NOT know if the 124 box is a straight swap with 114 box.
I purchased a second hand sportline box and that was a straight swap for
a non sportline box in my 124.
Nobody mentioned sticking brake pads.
Crud builds up and they do not slide freely when the brake pedal is released.
It only takes a small amount of constant rubbing against the disc to have an appreciable mpg affect.
Take all the pads out and give them a good clean, and coat the sliding...
a 124 sportline box is a direct replacement and will be an improvement.
you must get the pitman arm with the box as it is considered an integral part of the steering box, and does not have a separate part number.