Mercedes Benz Coolant Expansion Tank Replacement - M112 W203

I'll show you how to replace the coolant (antifreeze) expansion tank and you can use this on how to do a coolant flush. This is a multi-use video that be used in reference for all the jobs related to coolant tank, coolant pump or sensor. The tools, parts, and procedure is all shown. I replaced the coolant expansion tank because it was leaking from the overflow valve. The car being worked on is a C-Class w203 C320 but the procedure is the same for various other Mercedes like E320 CLK320 C320 ML320 S320 SLK320.

[@vzwhector]

Just saved $300 thanks a lot everything was easy except draining. Did not want to mess with drainage so I put a heavy towel and took hose off that way some spills on towel but not much.

[@twmpalmer]

Thank you for this! Really helped me, luckily the part arrived via Amazon the next day and I only needed a couple of tools!

[@AllisonEstrada-y2w]

I am no mechanic however this looks relatively easy to me!

[@J8den]

Ty man this was a very well made video!

[@alihadjikarimi7086]

hah i have exactly the problem with cracked pipe. I thing the hose hanging there is just too heavy and moving a lot freely so with the time that little pipe cracks. i'll support the hose this time

[@jeantumer7061]

Same problem !!! Out of nowhere i had a message with low cooling water, with fan noise. I stop and look it was the little pipe that was broken. And i think as you, i think it’s the not attached hose which broke it

[@royalbohemian9757]

I just need to be confident to drain the coolant without making a mess

[@skz___belkis]

Thinks veuillezm informerde la position de pmh sensor pour w 203

[@paul_isaac]

Thanks,m

[@ThingsLike]

Very Welcome!

[@Ismael-te7gs]

Explicación perfecta. 🎉

[@alroykerspey6161]

Awesome thanx Buddy

[@monicamejia4332]

Hi there. Detailed video , Ty! Stupid question though. How do you implement the distilled water with the coolant fluid?

[@monicamejia4332]

Hi there. Detailed video , Ty! Stupid question though. How do you implement the distilled water with the coolant fluid?

[@ThingsLike]

Depends on the coolant you buy. Some coolant is "diluted", which means its pre-mixed with water. Some coolant is "concentrated" and you have to mix it with water, usually 50% concentrated coolant, 50% distilled water.