pmercury

iTrader: (2)

Guys, be careful if you have air in intercooler coolant after a few weeks
I couldn't get why this kept going on and of course looked a few times at my cap
it looked ok but wasn't
look at the old cap, after buying a new one from MB (only 16euros)
I tested the old rubber and it broke of, meaning it was dead

hope this helps at least a few of you






and of course, vacuum with your home made kit:

tusabes

You can eliminate the vaccuum procedure if you put on a vented cap and install an intercooler overflow tank

https://mbworld.org/forums/m275-v12-bi-turbo-platform/562924-intercooler-circuit-overflow-reservoir-2.html

pmercury

iTrader: (2)

thx I've seen that, this was just for those who wan't to keep original
I am having a aluminum tank maker building me a custom 25 liter icebox tank for my trunk. for me the best solution for overturned turbos
once I received the tank I'll see if I need a overflow too and where

if you have any info for icebox tank installs you're welcome

ItalianJoe1

I had the same issue with my cap, I noticed the car down on power but didn't attribute it to the i/c system since I had replaced the pump and bled it well. Turned out the cap seal was fried and the car was pushing out coolant and sucking in air when hot. New cap, refilled and bled, no more issues.

pmercury

iTrader: (2)

wow, that is wild but confirms
I would have freaked out lol*

I was so surprised that I missed that as visually, and touching with my fingers, that cap looked ok I even bend the rubber slightly but I should have bend it hard first time

thx for your info
look at that

v8mercedes

this is the absolute best upgrade you can do against air in the intercooler circuit. all OEM parts which fit perfekt. just plug and play.....

i did that 2 months ago and had since that day no more problems, no limb mode, no CEL,....
very recommend

https://mbworld.org/forums/m275-v12-...atibility.html


and the best of all: the system bleeds by itself

pmercury

iTrader: (2)

great !

pmercury

iTrader: (2)

Just curious about what you think

bigger coolers is a great Idea, but is taking the air from under the hood, where that super hot engine runs a stupid Idea that ruins it all ?

ItalianJoe1

That's my eventual plan. The new system is how it should have been from the start.

Welwynnick

Adding a header tank to the IC system is a great idea (I've been using one for years) and has all sorts of benefits.

However, it doesn't bleed the system. The system is full of airlocks, that doesn't change, and you still have to bleed it.

Nick

biker349

what is the part# for the original cap? i've searched online and can't find it.
thanks.
p.s. dealer wants $20.17 and is 50 miles away. i'll bet online for half the price if i can locate one.

v8mercedes

hi nick. i think that too but at least the water level in the new header tank falled the first three test drives. now the level ist absolutly constant. after this knowledge i am sure it bleeds a bit by itself.

v8mercedes

the old system was a constructional defect. mercedes needs 13 years to find that out

ItalianJoe1

The engine was designed for Maybach cars, they needed a turbo setup. It was ok enough, it doesn't really cause problems, it's just not optimum. That's the German way it seems, as long as it technically "works", it's good, doesn't' have to be logical or work well. Coming from Japanese cars, it's completely backwards, but that's the way the German engineering goes.

biker349

so no one has a part#?

v8mercedes

Part # is: A 124 500 04 06

biker349

thank you.

pmercury

iTrader: (2)

finally, if you add the full size radiator, so:

A0995003603 full size radiator
A2792000185 Tank
A2790980891 rear metal line to tank
A2790980283 rear rubber hose

you got a real HOT upgrade, for only

+-500eur

I am going for this ! + trunk 7 gallon / 25L icebox
hot hot hot !

pmercury

iTrader: (2)

my full size intercooler radiatior arrived yesterday
I would need those connection plugs, if anyone know if there is a place to buy these without hose or if this is on all models from XXX on EPC they have them but with weird hoses

Welwynnick

Nice. That's the sort of HE we should all have.

The connectors are quick release, so you would need the mating receptacles from the matching hoses. I couldn't find them though. Might be able to use a BMW, Audi or VW part?

For my own curiosity, could you measure the L x W x D of the finned matrix?

Thanks, Nick

pmercury

iTrader: (2)

here you go, also the matching hose parts but they are expensive and I'll have to trash 80% of them
so I'll go for modifying the in and out




- Parts list -
Mode MD mode Mod. des. overview S-SEDAN LONG WHEELBASECatalog P24Major assembly:
Major assembly MD
Group 50 - RADIATOR
FIN/MD 222176 VIN Sales designation S 600 Assortment class Car Market All
Subgroup 190 - AIR PUMP,
WATER PUMP AND DETACHABLE BODY COMPONENTS
Item no. Part number Designation/description Quantity Version
150 A 222 501 37 91 COOLANT HOSE
FROM RADIATOR TO WATER PUMP
001
170 A 222 500 89 72 COOLANT PIPE
COOLER TO PUMP AND EXPANSION
RESERVOIR
Code: -805-806-807-808
001
170 A 222 500 06 00 COOLANT PIPE
COOLER TO PUMP AND EXPANSION
RESERVOIR
Code: 805/806/807/808

pmercury

iTrader: (2)

Welwynnick

Thanks.

Do those dimensions include the header tanks?

I may get one for myself. I think I would tempted to get some 19mm ID hose, heat it in some boiling water, and press it over the end of the fittings.

Nick

pmercury

iTrader: (2)

yes, full dimensions
you can dremmel those plugs off and make it strait out and in
with a bit patience .....

pmercury

iTrader: (2)

here is what you will get