There is a small valve on the passenger side front end of the radiator, not easy to reach. What I described is what dealer mechanic told me and it matches the WIS instructions. They don't do flushes, just drain and refill. There will always have a portion of old fluid remain in the engine block. If one is anal about getting rid of that last quart of old fluid inside the engine block, there is another drain valve on the passenger side of the engine block roughly under the 2nd spark plug. You will have to pull the wheel liner to get at it, not to mention jack up the vehicle and take off the front left wheel. If your coolant is changed regularly, I don't see that it matters with the residual coolant remained in the engine block.
Just changet the rad fluid today and went with the lover radiator hose variant.
Flushed a couple of liters while the hose was off just to feel good.
Don`t se the big deal as long as recommended intervals are folowed.
Unless of coarse your fluid is really bad.
That's cool...will probably procede to disconnect through hose -easier
Just did my plugs yesterday -will probably do the coolant next weekend
Thanks for the replies!
Disconnected the lower hose and flushed out the radiator fluid with water
All the coolant just drained right out with no problems -take off the cap
Re-filled with MBZ pre-mixed coolant (2 gallons)
Let the car run for 15-20 minute for the coolant to circulate
Ride the car to the gas station and re-fill with more coolant if needed
Dont worry about the bleeding it out -the system self bleeds by itself
Whole process took less than 45 minutes!
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