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Change out the radiator coolant

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Old 02-27-2009, 11:24 AM   #1
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Change out the radiator coolant

Does anyone here ever change their radiator coolant ? I have 60K at the clock . Is there a DIY around here ?

Andy
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Old 02-27-2009, 11:47 AM   #2
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i did the BG coolant flush at the shop where i take my car, if u never done it b4 i would reccomend it
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Old 02-27-2009, 11:53 AM   #3
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i did the BG coolant flush at the shop where i take my car, if u never done it b4 i would reccomend it
Omar26 wth is the BG ?? lolz and can i do it by myself?? Ok I just want to do a simple flush like just changing out the old coolant and refill with the new one I mean thats it lolz. Do you know where to refill after u drain it?? I heard there is no radiator cap on our car so is that true??
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Old 02-27-2009, 03:19 PM   #4
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My CLK owners manual tells me to change the coolant at 15 years or 115k miles, so there is no need for you to panic! Just make sure that the anti-freeze ratio is correct - unless you are in Florida of course.

I do have the details on my WIS that I could post here if you really are interested. It looks fairly straight-forward, but you would have to get underneath the car with the covers removed.
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Old 02-27-2009, 03:39 PM   #5
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My CLK owners manual tells me to change the coolant at 15 years or 115k miles, so there is no need for you to panic! Just make sure that the anti-freeze ratio is correct - unless you are in Florida of course.

I do have the details on my WIS that I could post here if you really are interested. It looks fairly straight-forward, but you would have to get underneath the car with the covers removed.
If u dont mind then I would love to see it. How about the cabin filter ? Do u know how to replace that too ? I remembered I have read it somewhere here in our forum but that just for CLK W208 not our.

Thanks,

Andy
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Old 02-27-2009, 04:30 PM   #6
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Omar26 wth is the BG ?? lolz and can i do it by myself?? Ok I just want to do a simple flush like just changing out the old coolant and refill with the new one I mean thats it lolz. Do you know where to refill after u drain it?? I heard there is no radiator cap on our car so is that true??

BG is a company tht has different flush machines n conditoners for cars. most dealers use BG products
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Old 02-27-2009, 04:40 PM   #7
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BG is a company tht has different flush machines n conditoners for cars. most dealers use BG products
have any idea where to refill since there is no rad. cap ??
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Old 02-27-2009, 05:48 PM   #8
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have any idea where to refill since there is no rad. cap ??

i'll call the shop n ask them how they do it
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Old 02-27-2009, 05:59 PM   #9
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have any idea where to refill since there is no rad. cap ??
You just refill through the overflow tank.

There have been a bunch of write ups on this forum. Search "coolant flush" and you should find something.
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Old 02-27-2009, 06:24 PM   #10
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How about the cabin filter ? Do u know how to replace that too ? I remembered I have read it somewhere here in our forum but that just for CLK W208 not our.

Thanks,

Andy

The cabin filter is located on top of the battery. Replace coolant is best by using the coolant flush machine to remove/exchange 100%. For DIY, to remove 100% old coolant, you MUST remove the drain plug on the block, if not only the old coolant from the radiator come out.
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Old 02-27-2009, 07:16 PM   #11
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Here's the info from a screen save of my WIS DVD.

I hasten to say that I have not done the job myself. It seems that you drain at two places. The coolant quantity, spec and anti-freeze ratio are on another page.

Clipped Items 1 & 2 are just about opening the hood, and removing the cover under the engine. Note that you fill at the radiator expansion tank.
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Old 02-27-2009, 11:47 PM   #12
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so there are two plugs that I need to loose right ??

1st : the radiator drain plug
2nd: the crankcase drain plug

then after that u just refill from the compensation tank. Am I missing anything ???

Andy
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Old 02-27-2009, 11:51 PM   #13
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The cabin filter is located on top of the battery. Replace coolant is best by using the coolant flush machine to remove/exchange 100%. For DIY, to remove 100% old coolant, you MUST remove the drain plug on the block, if not only the old coolant from the radiator come out.
so the location of the cabin filter that you mentioned above is the same as 04 clk 320 ??? also if i want to use the coolant flush machine I have to bring to the shop right ???

Andy
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Old 02-28-2009, 06:08 AM   #14
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Originally Posted by M-bENZ View Post
so there are two plugs that I need to loose right ??

1st : the radiator drain plug
2nd: the crankcase drain plug

then after that u just refill from the compensation tank. Am I missing anything ???

Andy
#12 says "bleed the system"

I assume that this means that after the refill you must get any trapped air out of the coolant circuit. To do this you would have to run the engine briefly to get the water pump operating. Leave the cap off the compensation tank while doing this and note any bubbles coming up. Finally, top-up the coolant to the correct level if required.

Maybe also put the heater on to let the hot water get to that area. (I'm not sure if M-B use a heat exchanger there)

I do know that an air lock in the coolant system can stop the heater working. Do you have the water/anti-freeze proportions already?
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Old 02-28-2009, 06:54 AM   #15
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Further thoughts on this topic.

1) I misled you about item 2 on the WIS.

#2 Disconnect battery ground if draining at crankcase. I assume that the water might gush onto connectors, etc. Obviously you would reconnect when draining is complete. Personally I would omit this step and just take care.

2) The anti-freeze type is important for your engine. Mobil GS 333 Extra is one of many listed as it contains anti-corrosion agents. Recommended proportion is 50% water/50% AF. Total quantity of coolant in the system is 11.5 liters.

3) From doing this job on other cars, I remember that a very slow fill of the coolant mixture is the best procedure to prevent air-locks.
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Old 02-28-2009, 04:31 PM   #16
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Originally Posted by M-bENZ View Post
so there are two plugs that I need to loose right ??

1st : the radiator drain plug
2nd: the crankcase drain plug

then after that u just refill from the compensation tank. Am I missing anything ???

Andy

No.......you should do the hard one first like the crankcase drain plug. If you can't remove the crankcase plug then don't waste your time and money by DIY. The coolant system on the Clk is self bleed system. That's why you see the tiny hose that connected from the upper radiator to the coolant reservior. That's hose allow air ro escape. Just fill up the coolant reservior until it full and tight the cap. By closed the cap allow pressure to build up and that pressure will activate the thermostat to open and allow water to circulate and bleed out the air. Run your engine with heater for at least 5-10 mins until it reach operating temp. Then shut it down and top of the coolant reservior. Be really carefull opening the coolant cap when the engine is hot. Good luck.
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Old 03-01-2009, 01:19 AM   #17
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No.......you should do the hard one first like the crankcase drain plug. If you can't remove the crankcase plug then don't waste your time and money by DIY. The coolant system on the Clk is self bleed system. That's why you see the tiny hose that connected from the upper radiator to the coolant reservior. That's hose allow air ro escape. Just fill up the coolant reservior until it full and tight the cap. By closed the cap allow pressure to build up and that pressure will activate the thermostat to open and allow water to circulate and bleed out the air. Run your engine with heater for at least 5-10 mins until it reach operating temp. Then shut it down and top of the coolant reservior. Be really carefull opening the coolant cap when the engine is hot. Good luck.
what about the cabin filter is it the same spot like u said for CLK 320-04 ???
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Old 03-01-2009, 02:18 AM   #18
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what about the cabin filter is it the same spot like u said for CLK 320-04 ???

2003-2006 Clk model are the same chassis (w209) and so I would think it in the same location I mentioned in my other post. It would be really costly for tooling if Mercedes changed the location of the cabin filter. I also own an 2001 Clk 430 (w208) and the cabin filter is under the glove box like many other older Mercedes model.
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Old 03-01-2009, 03:03 AM   #19
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2003-2006 Clk model are the same chassis (w209) and so I would think it in the same location I mentioned in my other post. It would be really costly for tooling if Mercedes changed the location of the cabin filter. I also own an 2001 Clk 430 (w208) and the cabin filter is under the glove box like many other older Mercedes model.
Thanks brothaa...u asian?
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Old 03-01-2009, 12:01 PM   #20
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u asian?
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Old 03-02-2009, 10:18 AM   #21
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and your name is Linh too lolz....man I havent check that cabin filter on my CLK yet hopefully its there like u said.
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Old 03-02-2009, 12:00 PM   #22
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Here is the cabin filter on a RHD UK car. Your's may be on the other side.

Get used to removing it because your battery lives underneath. Undo 3 clips, and 'unhook' the plastic assembly. The replaceable paper filter element is beneath. It can be a hassle to refit the plastic box - it has to be in exactly the right position for the clips to work.
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Old 03-02-2009, 12:05 PM   #23
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Here is the cabin filter on a RHD UK car. Your's may be on the other side.

Get used to removing it because your battery lives underneath. Undo 3 clips, and 'unhook' the plastic assembly. The replaceable paper filter element is beneath. It can be a hassle to refit the plastic box - it has to be in exactly the right position for the clips to work.
so is the filter under the battery ?? or u will see it after you unhook plastic assembly ??? and yes you are right it should be on the other side. Anyway, thanks a bunch

Andy
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Old 03-02-2009, 02:19 PM   #24
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and your name is Linh too lolz..

...... how do you know my real name?
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Old 03-02-2009, 02:40 PM   #25
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...... how do you know my real name?
cause your is "Klinh" lolz.
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