2015 ML63 M157 P0299 CEL Problem! please help!
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2015 ML63 M157 P0299 CEL Problem! please help!
Hey everyone, got a 2015 ML63 and I’ve been getting this CEL P0299 and I’ve changed the boost solenoid, and the check valve on the vacuum pump. I’m out of options, anyone else experience this? I’ve also changed the vacuum line elbow coming out of the check valve that was rooted and all lines are holding pressure hood. Please help. Thanks guys.
Last edited by MBenzEnthusiast; 04-14-2023 at 09:34 AM.
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See if this helps, it sounds similar to your situation.
https://mbworld.org/forums/e-class-w...d-shaking.html
https://mbworld.org/forums/e-class-w...d-shaking.html
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MBenzEnthusiast (04-14-2023)
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MBenzEnthusiast (04-14-2023)
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One thing to mention is that I’m not sure if the 2015 model has a exhaust valve but mine has a Brabus exhaust which uses the vacuum line to control the valve to control the quiet/sport mode exhaust valve.
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not sure on that but also post on the w212 amg forum you'll get more traction there
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MBenzEnthusiast (04-14-2023)
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Hey everyone. So I’ve checked the wastegate actuator rod on the driver side has a lot more vertical movement then the passenger side wastegate actuator rod leading me to believe that the c clip is missing. One thing I did notice was that the heat shield has rivets, not bolts, and I’m not sure if bending will give me more clearance but just wanted to share that. I tried to see if I was able to actually see the end of the rod but the shield blocks it. Where can I get the clips anyways? Thanks everyone so much.
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Hey everyone. So I’ve checked the wastegate actuator rod on the driver side has a lot more vertical movement then the passenger side wastegate actuator rod leading me to believe that the c clip is missing. One thing I did notice was that the heat shield has rivets, not bolts, and I’m not sure if bending will give me more clearance but just wanted to share that. I tried to see if I was able to actually see the end of the rod but the shield blocks it. Where can I get the clips anyways? Thanks everyone so much.
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Last edited by PeterUbers; 04-22-2023 at 03:54 PM.
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chassis (04-22-2023)
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thank you for that! Hopefully it isn’t the actual actuator and it’s just the clip. Cause it does seem to hold vacuum and is stiff. Just ordered a WIS USB.
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chassis (04-22-2023)
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So the actuator c clip is there. So I’m back to square one. No vacuum leaks and actuators hood vacuum. Ughh!
I’m thinking of maybe just taking it to the dealer for a diagnostic. I can’t seem to find anything and no one on the forums seem to want to help. This sucks.
I’m thinking of maybe just taking it to the dealer for a diagnostic. I can’t seem to find anything and no one on the forums seem to want to help. This sucks.
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What other symptoms do you have? Underboost can also be thought of as insufficient compression. How is your coolant and oil consumption?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
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What other symptoms do you have? Underboost can also be thought of as insufficient compression. How is your coolant and oil consumption?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
Wait….sorry but coolant? 😳 could that code mean coolant in finding its way into places it shouldn’t be?
I plugged the Brabus exhaust vacuum line so tomorrow let’s see. Oil consumption is perfect. 0. Also…which side is turbocharger 1….I’m hearing it’s passenger side turbo?
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What other symptoms do you have? Underboost can also be thought of as insufficient compression. How is your coolant and oil consumption?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
Try disconnecting vacuum connections to your aftermarket Brabus exhaust.
What is the history of this vehicle? How many miles are on it and how long have you owned it? What is the service history?
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C43 Fun Haver (05-16-2023)
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Have you read codes on this? What is your previous car DIY experience? What other mods are on this car besides the Brabus exhaust?
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Strictly speaking, no. A non-broken spark plug seals the combustion chamber. A broken spark plug is a different story and you would like have misfires.
Have you read codes on this? What is your previous car DIY experience? What other mods are on this car besides the Brabus exhaust?
Have you read codes on this? What is your previous car DIY experience? What other mods are on this car besides the Brabus exhaust?