Error code P170 Due to Vacuum Leak
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Joined: Apr 2009
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2000 CLK 320 Coupe
Error code P170 Due to Vacuum Leak
I have been chasing this for months, dating back to when I bought a MAF sensor because I got my check engine light with the code P170 (intake fuel trim something). I changed the MAF sensor, no luck!
I kept checking as recommended for a vacuum leak. I found this leak by running the car at idle and spraying MAS spray cleaner around the intake track, near the identified location, the spray effected the idle--bingo! I applied some extra torque to these bolts and the leak went away for about a month---but now it's back!
Needless to say I need to change this gasket, but I contacted my long time MB dealer and they said that the intake manifold is not “serviceable” here—in other words the intake manifold is sold as an assembly, so the gasket and torques specs are not available! They say I have to buy the entire intake manifold---big bucks!
Help, has anyone come across this same problem on the 320 motor? How have you guys solved this? I can’t believe anyone that is mechanically inclined would buy an entire manifold to solve this leak.
Thanks for any help!!!
I kept checking as recommended for a vacuum leak. I found this leak by running the car at idle and spraying MAS spray cleaner around the intake track, near the identified location, the spray effected the idle--bingo! I applied some extra torque to these bolts and the leak went away for about a month---but now it's back!
Needless to say I need to change this gasket, but I contacted my long time MB dealer and they said that the intake manifold is not “serviceable” here—in other words the intake manifold is sold as an assembly, so the gasket and torques specs are not available! They say I have to buy the entire intake manifold---big bucks!
Help, has anyone come across this same problem on the 320 motor? How have you guys solved this? I can’t believe anyone that is mechanically inclined would buy an entire manifold to solve this leak.
Thanks for any help!!!
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Joined: Apr 2005
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From: SCV SoCal
2002 CLK430
Here's a thread about a CLK55 owner who disassembled his. The manifolds are different (V6 versus V8), but the premise is the same. As an aside, the CLK430/CLK55/CLK500/C43 all use the same intake manifold.
Last edited by MarcusF; Apr 23, 2009 at 11:21 PM.
