SL/R129: 2001 SL 500 Vacuum Leak
12-05-2022, 11:43 AM
#1
Member
Thread Starter
2001 SL 500 Vacuum Leak
I there anywhere I could find an engine diagram of all vacuum hoses, the car is over 20 yrs old. Still has original tubes, has been driven 49,000 miles. The check engine came on in June of 2021, I had it checked, was told there was some vacuum leak somewhere, the light was reset and the car was fine till yesterday when the light came on again same issue.
perhaps someone could guide me
perhaps someone could guide me
12-05-2022, 03:01 PM
#2
Super Member
My vacuum routing guide is located on the cover of the electronics box.
Open the hood and look for the rectangular black box at the passenger side base of the windshield.
Open the hood and look for the rectangular black box at the passenger side base of the windshield.
12-06-2022, 06:03 PM
#3
Member
What code is your car showing? One common vacuum leak is the little rubber hose connecting to purge valve, it splits on the end causing it lose it seal.
12-06-2022, 06:57 PM
#4
Member
Thread Starter
12-07-2022, 06:36 AM
#6
Member
Thread Starter
12-07-2022, 08:48 AM
#7
Member
Read this post, every code you'll ever need.
https://www.newcougar.org/threads/engine-codes.105913/
Replace your gas cap first, after opening and closing the seal on the cap wears out too causing a leak there also.
https://www.newcougar.org/threads/engine-codes.105913/
Replace your gas cap first, after opening and closing the seal on the cap wears out too causing a leak there also.
Last edited by BenzBopper; 12-08-2022 at 12:27 AM.
