WIS 20.00 General
Diagram of M113 Coolant Circuit
M113 Coolant Change Interval
- OEM Coolant is supposedly good for 250,000Km or 15 Years.
- M-B DIY enthusiasts typically change the coolant every 3 - 5 years.
M113 Coolant Quantity Required
- Cooling System Capacity is 11.2L.
M-B Engine Coolant Anti Freeze Types
- BQ 1 03 0002 (G05) yellow M-B Sheet TBD
- BQ 1 03 0004 (G48) dark blue/green M-B Sheet TBD
- BQ 1 03 0005 (G??) pink M-B Sheet 325.5
M-B Article on Engine Coolant BQ 1 03 0005 (G48)
DIY Coolant Change Basic Technique for Flushing and Refill
- ONLY open the system with engine temperature less than 90C, and do it SLOWLY.
- Drain old coolant using Radiator Drain Plug (and engine block drain plugs if they exist).
- Dispose of the Coolant per your Local regulations, even though it is classified as "Biodegradable".
- Fill with rain water using Vacuum Filling System to remove trapped air bubbles. (Takes about 6-7L.)
- Drain again.
- Repeat fill with rain water and drain several more times until drained fluid is clear. (On last few drains, use Vacuum System without filling to remove deep trapped air bubbles.)
- Then fill with distilled water using Vacuum Filling System. (Takes about 6-7L.)
- Drain once more. (Use Vacuum System several times without filling to remove deep trapped air bubbles.)
- If using M-B coolant add as much as system will take using Vacuum Filling System.
- If using antifreeze concentrate add 6L of concentrate using Vacuum Filling System.
- Top up with distilled water.
- After all air has escaped top up with either M-B coolant or distilled water as required.
- Final Concentration using antifreeze concentrate should be 6L in 11.2L ie 54%.
- Note if you do a "complete" coolant change every 2 - 3 years, there is probably no need to do the several rain water and distilled water flushes.
DIY Radiator Coolant and Pressure Test
http://www.benzworld.org/forums/w140-s-class/1444114-photo-diy-coolant-service-la-vacuum.html