My car is a 2013 CLS 250 CDI and there appears to be a crack in the hard plastic pipe going into the throttle body. A common problem according to the dealer which is why they had the part in stock.
Anyway I think I have to remove the whole EGR valve assembly to access the bolts to remove the pipe, I don't think removing the actual gas cooler itself from the valve body is going to be enough.
From what I can tell the coolant runs from the block into the valve body via a second hole in the casting next to the EGR hole, and this means having to drain the coolant.
Am I correct? How does one drain coolant on these cars? Just pop the hose off and hope you catch it all, or is there a neat drain plug so I can partially drain? Does it need special MB coolant to refil? Any gotchas?
Anyway I think I have to remove the whole EGR valve assembly to access the bolts to remove the pipe, I don't think removing the actual gas cooler itself from the valve body is going to be enough.
From what I can tell the coolant runs from the block into the valve body via a second hole in the casting next to the EGR hole, and this means having to drain the coolant.
Am I correct? How does one drain coolant on these cars? Just pop the hose off and hope you catch it all, or is there a neat drain plug so I can partially drain? Does it need special MB coolant to refil? Any gotchas?