New Owner - Supercharger shut-off Q.
Thread Starter
Super Member
Joined: Oct 2005
Posts: 689
Likes: 5
From: Vegas
'21 GLC63, '19 M5
New Owner - Supercharger shut-off Q.
This has been discussed a lot here. Main scenario is car running 4-6 runs before the SC cuts off... mine ('04) does it after the first run. Something has to be wrong. Will the dealer look into this? Could it be the coolant pump that I read about? Any suggestions will be greatly appreciated. TIA
MBWorld Fanatic!
Joined: Aug 2006
Posts: 2,915
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From: Fremont, Ca
EVOTECH Mercedes AMG
It is the dreaded IC pump failure. If you can access to a diagnostic tool such as Autotap, etc, you can data log the IATs for each WOT run.
The dealer should be able to replace the pump.
The dealer should be able to replace the pump.
Out Of Control!!
Joined: Sep 2004
Posts: 13,394
Likes: 6
From: San Diego
2015 S212
If it is under warranty, then you will get the '06 style pump and flash. For free, that is not a bad fix. All it does is has the pump come on LESS often, thus extending the life of the pump. Not exactly an ideal fix.
If you are willing to pay, there are two routes you can go.
The cheaper is to replace the OEM Bosch pump with the famous marine pump (sump pump). Additionally, you can wire it to run whenever the car is running. Someone had posted before that the marine pump is supposed to have 5000 hours of life, which is PLENTY for $400.
The more elaborate fix is to actually separate your SC cooling system from the motor's. That is what the RennTech and EvoSport (I think) setups do. I'm pretty sure they both also use the heavy duty pump.
Hope that helps.
If you are willing to pay, there are two routes you can go.
The cheaper is to replace the OEM Bosch pump with the famous marine pump (sump pump). Additionally, you can wire it to run whenever the car is running. Someone had posted before that the marine pump is supposed to have 5000 hours of life, which is PLENTY for $400.
The more elaborate fix is to actually separate your SC cooling system from the motor's. That is what the RennTech and EvoSport (I think) setups do. I'm pretty sure they both also use the heavy duty pump.
Hope that helps.
