jjleonard

Have read numerous threads on flushing coolant system and have a few questions

1. Will I get more fluid by removing bottom hose than I would by just draining via the drain plug? If so, how much more?

2. How much fluid in total should I expect to drain and plan for replenishment?

3. Anything you have to do to the reservoir or does it drain also when you drain the radiator?

4. Had my radiator flushed locally 2 years ago and don't know exactly what they replaced it with, so are there any compatibility issues I should worry about or will it be minimized by having most of the existing fluid removed?

Thanks in advance for anticipated feedback.

vettdvr

I would do a good water flush due to not knowing what was previous and it wasn't MB approved fluid.

Zerex G-05
• 5 Year / 150,000 Mile Guarantee
• HOAT chemistry APPROVED for use in Mercedes Benz and newer
Ford & DaimlerChrysler vehicles (see owners manual for specific model years)
• Phosphate Free for use in European vehicles such as Volvo, BMW & MiniCooper
• Fully formulated to help prevent liner pitting in heavy duty diesel engines
• HOAT chemistry APPROVED for use in John Deere and MTU engines.
• Meets and/or exceeds the following industry and engine specifications:
Chrysler MS9769, Ford WSS-M97B51-A1, ASTM D3306, GM 1825M,
GM 1899M.
• Product Color: Yellow

jjleonard

Color of my "now" radiator fluid is green which is definitely not what was supposed to go back into the system when they did it 2 years ago. Thanks

SZMB

The coolant in my 04 E500 is yellow, but green in the 04 E320. Both cars still have the original coolant. I don't know why they have use different coolants since both engines are aluminum blocks. There's a drain plug on the engine block, removing this plug + the radiator drain plug should get most of the coolant out. I think there's no need to get 100% of the coolant out unless you see a "rusty" color.

Petmerctech

Factory fill coolant is bluish green. OEM coolant is yellowish in color.