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ESP, Cruisetronic problem

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Old Oct 25, 2012 | 04:49 PM
  #1  
lars's Avatar
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05 CLK 500 cab
ESP, Cruisetronic problem

'05 CLK 500. From a cold start, I'm regularly getting two messages: ESP malfunction, and Cruisetronic visit workshop. Sure enough, the cruise control doesn't work while this message is displayed. If I drive about five miles and restart, regularly both messages disappear. Sometimes, if I've not gone quite far enough, the ESP warning will come on for about 10 seconds and then go out. From a warm start, everything is fine.

I don't think the cause is under-voltage because it happens with a freshly charged battery. The car has a service appointment next week. Any thoughts in advance?
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Old Oct 25, 2012 | 06:07 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
You need to pull codes. It could be a speed sensor issue or similar. Do yourself a favour & turn the steering from lock to lock 5 times to reset the steering angle sensor. It can mess with the ESP.
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Old Oct 26, 2012 | 12:02 PM
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05 CLK 500 cab
Thanks. Time for a code reader then.
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Old Oct 26, 2012 | 10:07 PM
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Make sure you get one that can read MBZ's ESP codes - most generic OBDII code readers won't.
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Old Oct 29, 2012 | 08:22 PM
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05 CLK 500 cab
Thanks. I'd bought an Innova 1003 that probably doesn't read ESP codes but has good software support for powertrain codes. I have yet to have it plugged in while the fault messages appear but I've read somewhere that only the dealer can pull ESP codes. There are no DTC codes.

The one thing I know that's wrong with this car is a small transmission fluid leak dating from the summer when the dealer did a drain and refill (twice!). Nothing reaches the garage floor but when I wash the car after a dry spell I see what looks like a reddish-tinged oil sheen run off from under the engine area. It's going back this week for an inspection and presumably another try at stopping the leak. Curiously, MB appears not to have given us a low-fluid warning message. I'm wondering if this might be a cause.
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Old Oct 29, 2012 | 10:03 PM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Presume your car is still has a 722.6 5 speed auto. If so it is likely a common leak at the electrohydraulic pilot bush where the TCU (which is under the passenger kick plate) plugs in to the transmission on the RHS front diagonal. If it is & there is fluid in your TCU harness it could be causing all the problems you are having.

This is a pic of the part ~ costs a whole $10



See 115



Here is the W203 bulletin. Ignore VIN's it applied to all 2000 onward 722.6 transmissions.

https://mbworld.org/forums/attachmen...e-campaign.pdf

Read those codes!
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Old Oct 29, 2012 | 10:13 PM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Should this be the issue. Here is the replacement method which you can find in the Wiki.

https://mbworld.org/wiki/index.php/F...ngR%26R-1-.pdf

It is important to lift the front passenger carpet & ensure that fluid has not wicked up the harness. If it gets into the TCU it is an expensive replacement.
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Old Oct 29, 2012 | 11:45 PM
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I think the MY2005 CLK500 has the 722.9 7Gtronic transmission, so that would not have the pilot bushing leak. I will say that when I did my transmission service, I did not get the pan gasket seated correctly and I had a leak. What I found is that the exhaust bracket needs to be remove to get the pan in place without disturbing the gasket seat.
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Old Oct 30, 2012 | 12:50 AM
  #9  
lars's Avatar
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05 CLK 500 cab
Yes, it's the 7G-tronic.
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Old Oct 30, 2012 | 11:39 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
OK - 2005 was the changeover year globally some 5 speed some 7 apart from S Class. Had a previous owner here think he had a 7 speed when he in fact had a 5 speed.

Sorry ~ then you will have to look further.

Let's see what codes are displayed.

In SA they kept all M112/113 engined cars 5 speed & only moved to the 7G with M272/273 quadcam cars.

Last edited by Glyn M Ruck; Oct 30, 2012 at 11:44 AM.
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Old Oct 30, 2012 | 11:53 PM
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Here in the US, it went by "model year". Generally, the new model year comes out in the summer prior to the year, so by August 2004, dealers were getting deliveries of MY2005 vehicles. Our 2005 CLK 500s were equipped with the 722.9, but the V6 didn't get it until MY2006. Same with the E class. I think the mY2005 SLK was the only V6 that year with the 722.9. However, the AMG models kept their modified 722.6 in all models. All non-AMG MY2006's have the 722.9, but I think it wasn't until MY2007 that AMG switched over to the 7Gtronic.

The "model year" concept can be confusing to non-USA folks because some countries look at "registration year". Here, that means nothing - everything we do is based on model year. And very rarely does MBZ change anything in the middle of a model year. Ford can be bad about it, though. Model year is also not just a made-up thing, either. CAFE (fuel efficiency) and safety equipment requirements go by model year. GM actually played this game to their favor with CAFE. Back in the 90's when everybody was scooping up giant fuel guzzling SUVs like Tahoes and Suburbans, GM was in jeopardy of exceeding their 1996 CAFE allowances, so they just started making them as 1997's, but that was in January of 1996. By July of 1996, they were selling 1998's! Of course this backfired when the US government started requiring additional safety equipment in newer models, so in order to advance to the next year, they had to include things like ABS and extra airbags.
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Old Oct 31, 2012 | 08:16 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yes. I had to get used to the MY thing when I joined the forum. Thanks for clarification of 722.9 in CLK for US.
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Old Oct 31, 2012 | 02:38 PM
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05 CLK 500 cab
We're wandering off-topic but I wanted to add that MBNA has taken an approach to CAFE fines that contrasts with GM's. MB seemingly doesn't care. Between 1985 and 2010 (the most recent year for which statistics are available) MB has paid about $335 million in CAFE fines. Year after year, MB has been the worst offender in the USA by quite a long way. It's the price of luxury? The official statistics are here.
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Old Oct 31, 2012 | 05:48 PM
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From: Llandudno, Cape Town, South Africa
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Yep! - They need to sell the A & B Class in the US. Smart will never balance the books for them.
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Old Oct 31, 2012 | 08:08 PM
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Originally Posted by Glyn M Ruck
Yep! - They need to sell the A & B Class in the US. Smart will never balance the books for them.
Is this why MB bought Smart?
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Old Oct 31, 2012 | 08:12 PM
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Originally Posted by Glyn M Ruck
You need to pull codes. It could be a speed sensor issue or similar. Do yourself a favour & turn the steering from lock to lock 5 times to reset the steering angle sensor. It can mess with the ESP.
Turn the steering from lock to lock 5 times to reset the steering angle sensor?
Should this procedure be done from time to time (like the ECU reset)? I reset my ECU once a month or so.

Last edited by mis3; Oct 31, 2012 at 09:11 PM.
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Old Nov 6, 2012 | 01:58 PM
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The dealer reported codes C1510, C1038 and C1172 in the ESP section of the printout. C1172 goes with "N49 (Steering angle sensor) : Internal fault" The dealer cleared the code but the two ESP and Speedtronic messages were present again this morning. Turning the steering from lock to lock does not clear them but a short drive and a restart does so every time.

Where is the steering angle sensor located, please?
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Old Nov 6, 2012 | 03:12 PM
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In the Wiki here:

https://mbworld.org/wiki/index.php/F...gle_sensor.pdf
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Old Nov 6, 2012 | 05:43 PM
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Thanks Glyn.
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Old Nov 30, 2012 | 03:16 PM
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I have the "ESP Malfunction Visit Workshop" warning message its been about 1 month now.
It started after i changed the battery which is a new Bosh 100 AHR
I get the message in the morning but it goes away after a short drive.
it stays longer on a cold or rainy morning than a hot weather.
I have tried to wash the car but i didn't get the message after a wash, so i ruled out the rain thing.
I didn't get the message on the days when the temperature was around 26~28 degree C.
I have already Changed the Electrohydrolic Pilot Bush but still the same.
the Mechanic argued that the error is due to some dirt building on the Throttle flap, he cleaned it and still the same.
I have checked the car with the star diag 2 times, none of them was on the morning when the malfunction was there. The first time i had 3 faults stored, Terminal T30 low voltage, Steering Angle Sensor, and Lateral Acceleration Sensor. The second time there was only the steering angle sensor fault stored.
I not quit convinced with the steering angle sensor nor with the lateral acceleration sensor, why it goes away after the car warm up??!!
Any idea guys????
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Old Nov 30, 2012 | 06:31 PM
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Chawki, did you recalibrate the steering angle sensor after replacing the battery? If not, it may be that it incorrectly calibrated itself through driving. You need to reset the sensor first by pulling the fuses (#55 and #59 on the front SAM under the hood). Leave them out for about 10 minutes, then reinsert them and start the engine. Turn the steering wheel fully lock to lock twice.
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Old Dec 1, 2012 | 09:09 AM
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Rudeney is as usual spot on. Lock to lock twice with a new sensor should achieve calibration. The reason that I recommend 5 times lock to lock is that as the SAS ages we find that sometimes twice lock to lock does not achieve perfect calibration.

The Yaw or lateral acceleration sensor can also be troublesome.
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Old Dec 3, 2012 | 02:06 AM
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Originally Posted by Rudeney
Chawki, did you recalibrate the steering angle sensor after replacing the battery? If not, it may be that it incorrectly calibrated itself through driving. You need to reset the sensor first by pulling the fuses (#55 and #59 on the front SAM under the hood). Leave them out for about 10 minutes, then reinsert them and start the engine. Turn the steering wheel fully lock to lock twice.
I just saw your reply. it seems logic. I will try and get back to you guys.
thanks Rudeney and Glyn
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Old Dec 5, 2012 | 06:01 PM
  #24  
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guys I did calibrate the steering angle sensor with no luck. still I get the message in the morning from a cold start. what r the symptoms of speed sensors?
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Old Dec 5, 2012 | 07:00 PM
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You probably need to get the codes pulled again to see what's going on. If it's a bad steering angle sensor, then that's located behind the airbag and steering wheel, and is part of the "clockspring" assembly.
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