Need help with possible boost leak/vacuum lines S600/M275
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 19
Likes: 4
W220 S600 2003
Need help with possible boost leak/vacuum lines S600/M275
Yesterday I went through the process of doing my sparkplugs, did all 24, wasnt very hard, car seemed to be running smoother than ever until I brought it out, gassed it and it was less than half power, no boost at all. Ive been since then frantically searching about for whatever god forsaken vacuum line or boost leak this might be, there are none, I fixed the few that were there, and there is not a single hissing noise coming from this engine bay. There is no smoke coming out, no oil dripping out of the exhaust, no check engine light so that leaves out turbos. I did clear the codes that were in the car before with a cheap scan tool, maybe that cleared adaptations as well? Besides that I did not refill the intercooler as I lost no fluid pulling them out, maybe thats it? Also what I believe to be MAP sensor had the nipple broken off, fixed it with JB weld for the time being, its right next to the throttle body and vacuum lines into the intercooler, maybe that is toast or leaking? For reference its a 2003 S600 with 105k miles, any help would be greatly appreciated Ive been chasing my tail for 2 days now.
Senior Member
Joined: Aug 2014
Posts: 370
Likes: 31
S55 AMG
It could only be two things - your intercooler pump is not working or one of your map sensors is not working. Since you have an S600 which is a complicated car with many potential failure points I highly recommend you buy a star scan tool. It is a no brainer - if you had one you would have found your answer in 10 minutes.
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 19
Likes: 4
W220 S600 2003
It could only be two things - your intercooler pump is not working or one of your map sensors is not working. Since you have an S600 which is a complicated car with many potential failure points I highly recommend you buy a star scan tool. It is a no brainer - if you had one you would have found your answer in 10 minutes.
