SL/R129 2001 SL 500 Vacuum Leak - MBWorld.org Forums

Dec 5, 2022 | 11:43 AM

SUHAIL

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Member

Joined: Jun 2003

Posts: 128

Likes: 1

From: California

1986 190D 2.5 (W201), 1999 SLK230 (R107), 2000 S500 , 2001 SL500, 2005 G55 Grand edition 327 of 500

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

Dec 5, 2022 | 03:01 PM

mahunt

Super Member

Joined: Aug 2019

Posts: 701

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From: Lutz, FL

1997 MB SL600

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.

Dec 6, 2022 | 06:03 PM

BenzBopper

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Joined: Mar 2019

Posts: 171

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From: Aurora,CO

06' Audi Quattro, 00'SL500

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.

Dec 6, 2022 | 06:57 PM

SUHAIL

Thread Starter

Member

Joined: Jun 2003

Posts: 128

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From: California

1986 190D 2.5 (W201), 1999 SLK230 (R107), 2000 S500 , 2001 SL500, 2005 G55 Grand edition 327 of 500

Quote:

Originally Posted by BenzBopper

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.

PO442 if anyone on this forum could elaborate on it.

Dec 7, 2022 | 01:57 AM

Ahmed

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Joined: Apr 2002

Posts: 2,665

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From: Bahrain

R129 SL55 AMG & W208 CLK55 AMG

Major Evap leak, read post #3 and replace the hose. That's what i did on my 99.

Dec 7, 2022 | 06:36 AM

SUHAIL

Thread Starter

Member

Joined: Jun 2003

Posts: 128

Likes: 1

From: California

1986 190D 2.5 (W201), 1999 SLK230 (R107), 2000 S500 , 2001 SL500, 2005 G55 Grand edition 327 of 500

Quote:

Originally Posted by Ahmed

Major Evap leak, read post #3 and replace the hose. That's what i did on my 99.

Is this what you mean?

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.

Dec 7, 2022 | 08:48 AM

BenzBopper

Member

Joined: Mar 2019

Posts: 171

Likes: 53

From: Aurora,CO

06' Audi Quattro, 00'SL500

Quote:

Originally Posted by SUHAIL

PO442 if anyone on this forum could elaborate on it.

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.

Last edited by BenzBopper; Dec 8, 2022 at 12:27 AM.