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S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

2004 S-600

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Old Apr 10, 2017 | 09:08 PM
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Louis V
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S-600 .... GL-550
2004 S-600
Typical start up. ....Engine starts and runs very smothe. It may run smothe all day, no problems. Then at times it will go in half power mode. I will shut it off then start it again and it will run smothe. I never know when this will happen. Where do I start, what do I check out first. ... ECU ??? ...
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Old Apr 10, 2017 | 10:59 PM
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W212 E350; W166 GLC300; W164 ML550; W164 ML63; W221 S65; W220 S430; Escalade ESV
CEL came on in idle mode?
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Old Apr 10, 2017 | 11:54 PM
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Originally Posted by Louis V
Typical start up. ....Engine starts and runs very smothe. It may run smothe all day, no problems. Then at times it will go in half power mode. I will shut it off then start it again and it will run smothe. I never know when this will happen. Where do I start, what do I check out first. ... ECU ??? ...
coil packs or voltage transformer on top of the engine

You can rent them at v12icpack.com to narrow down what is at fault . Start with the transformer first
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Old Apr 11, 2017 | 02:20 AM
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2006 S600
First step is get a cheap OBD2 diagnostic code reader to download the fault codes. Every MB owner should have one.

Do you know what I mean by that?

Nick
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Old Apr 11, 2017 | 03:29 PM
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2001 S600 Lorinser Body Kit & W215 Front-End Conversion
Originally Posted by Louis V
Typical start up. ....Engine starts and runs very smothe. It may run smothe all day, no problems. Then at times it will go in half power mode. I will shut it off then start it again and it will run smothe. I never know when this will happen. Where do I start, what do I check out first. ... ECU ??? ...
I had the same problem on my 02. For me it was the voltage transformer.

If you want, contact Clark Rupp over at v12icpack.com He let's you 'rent' the voltage transformer.
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Old Apr 23, 2017 | 07:52 PM
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S600
My 03 S600 did the same. Put Right coil pack, had the transformer check, it was a bad ECU by the time I was done. Cars been perfect for over a year now.
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Old Apr 24, 2017 | 03:01 PM
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You're not at this stage yet, but if it is the ECU, we can repair it for you for a lot cheaper than what your dealer will charge you. Click here if and when you need us.
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Old Apr 24, 2017 | 03:20 PM
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Originally Posted by ecmexchange
You're not at this stage yet, but if it is the ECU, we can repair it for you for a lot cheaper than what your dealer will charge you. Click here if and when you need us.
your charge to repair is over $150 more than m and b charges to repair a ecu
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Old Apr 24, 2017 | 03:40 PM
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Excellent point, over the years we have helped 70,000 people get their rides back on the road. Nothing against M & B, mainly because we're unsure of who you are talking about, it's our reviews that set us apart from our competitors. It all comes down to service, and the name backing the guarantee.
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Old Apr 24, 2017 | 04:33 PM
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Originally Posted by Ron W
My 03 S600 did the same. Put Right coil pack, had the transformer check, it was a bad ECU by the time I was done. Cars been perfect for over a year now.
How can you tell if ECU good or bad? Is it a test with STAR system?
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Old Apr 26, 2017 | 06:10 PM
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My 03 started to create over problems on top of misfiring, with and without codes.
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