190E Build Thread (Turbo+EVO 2)
Here is the bleeder in action. I found that rubber cap for the the fluid level sensor port on top of the reservoir was dried out and leaking under pressure, so I have it capped off for bleeding and a replacement on the way.

The only other thing to mention is a preview of the next project on the car...

out of curiosity would you happen to know what makes up for the difference in track width with the 2 evolution models versus standard 2.3 or 2.6? is it just wider wheels/ tires? do they have longer control arms/ different suspension pick up points?
i remember reading a long ways back the later 201s had slightly taller front shock mounts and better fuel tank baffling. I never verified but there very well could have had updates to chassis. the forum stuff is lots of hear say and according to different online sources for specs there seems to varied numbers on info such as curb weights etc so its hard to tell whats what. for instance i kept finding online searches the evo2 used 245/40/17 front and rears, so i am under the assumption that besides amg bumper fender spacers the front wheel tubs could be different.
I don't think there is a track width difference, just the wider wheels. As far as I know the EVO 2 had some tub work done in the wheel wells for additional clearance. I'm not sure about the EVO 1. I don't think I'll have an issue running 7.5" wheels though.
as for track width i read somewhere either online or old magazines in comparison to the 16vs and evos one of them stated that the evo1 had a larger track width than evo2. typo?
7.5" width on a 201 is cake so long as et offset is near 36 granted it all depends on your ride height atleast for non coilover cars. i have a set of real amg penta 16x7.5 et 42 or 44 with 205/50s that barely clear front strut with a small spacer (wheels are bent but hold air so i use for rollers no street/track experience with it). aside from that ive used 16x8 et34 r129 evo1 wheels with 215/45s and 16x7.5" 3pc OZ fittipaldi wheels same 215/45s with no issues for about a decade. so it all depends; was curious how much closer towards et 0 would be necessary just to clear the spring/perch on front coilovers as that clearance is small already for front 201 wheel wells. if you are using a evo2 kit why not wider than 7.5"? stock evo2 wheels were 8.25" chances are fenders will need to hacked up to fit the arches anyways.
Last edited by theonlyone; Jan 30, 2025 at 07:06 PM.


I'm using the setup Hennes Design shows to facilitate swapping an EVO/W126 coolant reservoir to the original battery location with their mounting kit.

This should free up a little more space to mount the turbo.

Next up is pulling the rear seat and figuring out wire routing through the car, as well as removing all the old trunk mounted CD changer wiring. The car has a cassette player. I'm guessing it wasn't optioned for a CD changer, but maybe Mercedes installed the wiring/cable for it in every car?
Last edited by kombatrok; Feb 5, 2025 at 06:40 PM.

I was able to run the cable through the factory wire run under the carpet and to the passenger footwell, where it fits neatly behind all the trim and heads in to the engine bay through one of the factory bulkhead penetrations..

I hooked the hot cable to the added fuse panel up front and test started the car with no issues. I'll run wire for electric fan relays out of the new panel prior to installing the coolant reservoir.

I'm happy with how the battery relocation all came together. I think with a slightly shorter battery I could easily install the factory cover over the spare tire well and maintain full use of the trunk if I wanted. So thats a nice upside.
The Best of Mercedes & AMG
In the meantime this is what I did to properly lock the lines in place.


I have a cheap amazon special box of assorted crush washers. I found one that fit around the fitting and prevented the 14mm hex from sliding through the hole. I wanted to use copper so that I was sure that it didn't damage the fitting or put extra stress on anything.
You can also see my completed coolant reservoir relocation to the original battery compartment. This frees up significant room for the turbo, whenever I get to that stage of the project.

I also had a bunch of hardware and the entire throttle assembly cleaned up and re-zincked. The car is never going to be a show car, but I do want it to be presentable, and little stuff like that is a nice touch.

While I had the easy access, and since the throttle bracketry was off the car anyway, I deleted the cruise control and the engine bay side of the AC. The AC piping was a nightmare to get out from under the engine and back of the compressor, and includes a fuel return cooler that I removed and won't be using.
With that done, everything started to go back together.

Everything cleaned up reasonably well and I managed to find the right belt size with a little measuring and guesswork. For reference the correct belt size for an M103 with the air pump and AC compressor removed is 6PK2275. Maybe that will save someone else a bit of trouble down the line.

From there it was easy enough to drop a new radiator in place! You can really see how much room there is now on the passenger side of the engine.

And this shows how little clearance there is for an electric fan on the 6 cylinder 190E, but a slimline Spal unit worked and should provide more than enough airflow in the factory shroud.

I also built a new control circuit for the electric fan, using twin relays, mounted out of the way and triggered through a BMW (E21/E30/E28) auxiliary fan temperature switch, that threads in to the cylinder head just forward of the factory temperature sensor on the Mercedes.

With that done the cooling system is back to 100% and ready for the next phase.
Which was... test fitting the wheels, where I ran in to a bit of an issue. The rear fit perfectly, as seen below, but the front wheels don't clear the R129 brake calipers without 3-5mm spacers. This wouldn't be the end of the world, but wheel fitment is looking like its going to be pretty tight up front with how low I'm expecting the car to sit. I have a set of W124 400E rotors and calipers that will clear the wheels, but the 400E rotors don't clear my non V8 lower control arms.
I'm not happy about it, but the right thing to do is to replace the lower control arms with the version that came on the 400E, so that everything bolts up properly. I could probably get away with taking a grinder to the LCAs that I have on the car, but even then I think I'd only end up with 1-2mm between the rotor and ball joint, and that's not enough wiggle room for me. So enjoy a picture of the wheels on the rear while I wait for new control arms to arrive...
Also interested in knowing what you are doing with those removed AC parts. I could use spares for my car. Not sure where you're located, probably not nearby me (Florida).
Also interested in knowing what you are doing with those removed AC parts. I could use spares for my car. Not sure where you're located, probably not nearby me (Florida).
Honestly I've always had good luck building a cap out of duct tape and securing it with a hose clamp for smoke tests...
This is the boot though: https://www.ebay.com/itm/388242892820
I couldn't find a 4-2.5 that would stretch enough to fit, so I'll need to adapt to 2.5 for the intercooler piping.

any idea what the spring rates were?

The M104/V8 style lower control arms are required to fit 400E brakes to the front of a W124 or W201. The rotors hit the ball joint on the earlier style control arms. Other than the ball joint housing the control arms are identical across all models.
Last edited by kombatrok; Jul 9, 2025 at 02:23 PM.






