I poured coolant into the engine, then transmission fluid starting leaking from what seemed like nowhere. I started the car and coolant reservoir became pink and began foaming.

I don't know how this happned, now I have to do a coolant and transmission fluid change again.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Honestly don't know what to do with myself at this point. Maybe owning this thing, is too far over my head.

Transmission is presently designating. I quit.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Would bet your transmission cooler heat exchange pipe in the bottom of the radiator has a leak in it.

__________________
1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

Father why on earth did you pour coolant in to the engine ?
Do you mean the radiator ?
Only way water can get in the engine is if the auto box cooler pies inside the radiator are leaking coolant in to the transmission . This mixture in turn will end up in the coolant over flow tank. A flush is needed after you find out just what as gone wrong , and then it may have done damage to the auto transmission .

I poured it inside the upper radiator hose.
Well, at least I didn't drive the car car but, that probably doesn't matter, even at a standstill the damage is probably done.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Time to replace the radiator and flush everything

__________________
CENSORED due to not family friendly words

Do I have to bring it to a repair shop (tow it) to flush the transmission fluid?
Or can this been done at home?

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

What you can be really discouraging but since you didn't drive the car with this condition, you may have caught it in time.
If you have drained the coolant right away, drop the transmission pan. The water and tranny fluid should still be separated. In fact, you may be really lucky and there is no trace.

As the others have said, drain the transmission NOW. Since it wasn't driven, you should be ok.

The transmission cooler in the bottom tank of the radiator is bad. Is this the replacement radiator? If so I'd be filing for a refund!

Regarding the questions about filling the engine with coolant - I do the same thing. If you don't, the engine block has to fill through the bleed port on the thermostat and it takes HOURS. Given the tendency for cracked or warped heads on the 603, there's a 0% chance I'm gonna run it until the thermostat opens. Filling the block helps get the coolant circulating much faster and air bled quicker.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]

It's too late, the dropped the tanny pan and it was already mixed up.

So now what?

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Put fresh fluid in, flush it refill and hope for the best. Perhaps no damage.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

ok, getting a new radiator will probably come, months from now, unfortunately.

But the part I still don't understand is when I filled with coolant, transmission fluid starting leaking out the rear of the transmission. I didn't even start the car when it was happening.

I thought I it was from the small spill I made but it eventually turned into a huge puddle.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Don't let it sit. Find/fix the problem, drain the converter too, service it and you may be fine.

Good luck and keep us posted!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

300SDL radiator is NLA.

You filled the old radiator? I thought it is damaged by the clutch fan. If you did fill the damaged radiator then probably the coolant compartment and the transmission fluid compartment, below the radiator, is breached. Coolant drain out from the rear of tranny. I feel for you, the SDL changed from a daily driver to crap in a few days.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

Father ...,

I can second what others are saying here - I recently replaced my radiator for precisely this reason; an intermixing of coolant with trans oil.

Caught it quickly. Replaced radiator - and trans cooler lines; these were due for replacement anyway...

Dropped trans pan, flushed trans (twice so far, with filter changes). In my view, dropping the trans pan is essential, as water will tend to settle there - below the oil, obviously.

Car is running great since; I'm hoping I just got lucky. Hope you will, too!

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'83 300 SD
'05 E320 4Matic
'06 BMW 530 xi
'68 Triumph TR 250 - The only car I ever loved more than the Mercedes; who needs electricity, anyway? - Damn, why did I sell it?!
'59 Jaguar 3.4 'Le Chat Noir' - Damn, why did I sell it?!

It's difficult to make predictions, especially about the future.
- Niels Bohr