‘04 c32 intermittent supercharger disengagement
Thread Starter
Newbie
Joined: Nov 2018
Posts: 3
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W202 ‘98 C43, ‘00 C280
‘04 c32 intermittent supercharger disengagement
Normally around town, supercharger works fine. Only when I’m cruising down the highway, for no identifiable reason, the supercharger stops working and it falls flat. So far, no real time codes, no historical codes. I’ve replaced I/c pump, iat sensor, fuel filter. I’ve also tried eliminating any cooling bubbles (if it had any). The car is super strong when it’s working. Fuel pump is next…. I know it has have 2 fuel pumps with one including the fuel level sensor. There is 1 funny thing. Fuel level never reads full. Scans were done using Mercedes STar dIag.
The only other electrical issue that I have yet to uncover is the heated seats don’t work. Is there a relay for the supercharger? SAM?
The only other electrical issue that I have yet to uncover is the heated seats don’t work. Is there a relay for the supercharger? SAM?
Last edited by 911crash; Oct 22, 2023 at 06:16 PM.
Junior Member
Joined: Dec 2013
Posts: 42
Likes: 9
From: California/Hawaii
2003 C32 AMG
911crash their is a relay for the SC pump in the trunk Sam fuse box, SC should pull in the SC clutch at 2500 RMP. 1: Have you checked serpentine belt for slipping? 2: AIT data recorded? SC will drop out with high AIT. 3:Are you running a different SC pulley from stock/made changes? SC pulley gapping wrong? SC pulley clutch solenoid connector damaged/loose.
I've not run into this issue with either of my C32 AMG but Just a few ideas to consider when trouble shooting this issue, good luck!
https://mbworld.org/forums/c32-amg-c...-t-engage.html
I've not run into this issue with either of my C32 AMG but Just a few ideas to consider when trouble shooting this issue, good luck!
https://mbworld.org/forums/c32-amg-c...-t-engage.html
Thread Starter
Newbie
Joined: Nov 2018
Posts: 3
Likes: 0
W202 ‘98 C43, ‘00 C280
Thx for the reply. Everything is stock. New AIT. Connector is good. New belt and tensioner. SC works fine until I have constant load, ie cruising speeds, going uphill at freeway speed. No codes, recorded or in real time. I’ll pull the relay and replace. It’s so discouraging. I just got this car and suspect it was a problem for the previous owner, but it’s intermittent and seemed perfectly fine when I test drove it. I have few performance things I want to do, but until this is sorted I must remain focused. It’s a super clean car otherwise. Always maintained at the dealer
until 130k miles (158k now).
until 130k miles (158k now).
Junior Member
Joined: Dec 2013
Posts: 42
Likes: 9
From: California/Hawaii
2003 C32 AMG
Thx for the reply. Everything is stock. New AIT. Connector is good. New belt and tensioner. SC works fine until I have constant load, ie cruising speeds, going uphill at freeway speed. No codes, recorded or in real time. I’ll pull the relay and replace. It’s so discouraging. I just got this car and suspect it was a problem for the previous owner, but it’s intermittent and seemed perfectly fine when I test drove it. I have few performance things I want to do, but until this is sorted I must remain focused. It’s a super clean car otherwise. Always maintained at the dealer
until 130k miles (158k now).
until 130k miles (158k now).
https://mbworld.org/forums/c32-amg-c...concerned.html
https://mbworld.org/forums/c32-amg-c...-engaging.html
