EnchantedScribe Posted April 23 Share Posted April 23 Hello, I recently installed a new authentic MB ABS sensor on my 2006 CLS C219 320CDI. However, I noticed that the ABS/ESP light stayed on. Upon closer examination, I discovered that the ABS ring had corroded and become detached. Yesterday, I replaced the ABS ring with a new one, and everything appeared to be fine. During the initial test drive, the ABS/ESP light briefly turned off but came back on within seconds. I used icarsoft to measure the speed at the problematic sensor, and once again, it showed a reading of 0mph while the others were displaying accurate readings. Upon inspection, it was seen that the sensor is slightly longer than the original by about 2-3mm. Consequently, it came into contact with the new magnetic ring, causing damage to the rubber component. The wear on the end of the sensor is plainly visible. Has anybody experienced something like to this? This specific sensor was identified as suitable for a 2006 C219 CLS vehicle with the component number A2115401217. Quote Link to comment Share on other sites More sharing options...
EnchantedScribe Posted April 23 Author Share Posted April 23 Quote Link to comment Share on other sites More sharing options...
BENZE220AMG Posted April 23 Share Posted April 23 Have you ensured that you completely eliminated any remnants of the first magnetic ring prior to installing the replacement? If there is a residual amount remaining, this may occur. Quote Link to comment Share on other sites More sharing options...
KOOLCAR Posted April 23 Share Posted April 23 You have not provided information on the part number of the new sensor or its source. If I were to visit a Mercedes dealer, I would bring both components and present them to the parts department. Alternatively, if I were to order the parts by mail, I would include side-by-side images of them. If you have made a purchase from an internet vendor and received a "compatible" component, this may be considered one of the potential hazards. Quote Link to comment Share on other sites More sharing options...
EnchantedScribe Posted April 23 Author Share Posted April 23 The whole magnetic ring was completely removed and both the drive shaft end and the interior of the hub were meticulously cleaned before being reinstalled. I have recently observed that the part number of the new sensor is A2115401217, while the part number of the original sensor is A2115402417. It seems that I have neglected to thoroughly investigate when installing replacement parts. Although both part numbers initially appeared to be the same, it is now evident that they are not, as indicated by the slightly longer size of the sensor. I made a foolish mistake. Thank you for your guidance. Fortunately, I possess a new additional ABS ring to install. However, disassembling the rear hub once again will be an arduous task. Quote Link to comment Share on other sites More sharing options...
KOOLCAR Posted April 23 Share Posted April 23 The item is a rotational speed sensor for the rear axle, specifically designed for the left and right sides. It has a part number of 211 540 24 17. The item has been replaced with a new one, specifically identified as A 211 540 30 17. Quote Link to comment Share on other sites More sharing options...
NAVITEL Posted April 23 Share Posted April 23 Have you tested both the front and back sensors? There must be a specific reason why these component numbers are different. The only thing that I can think of is that the component is right for the automobile, but it is incorrect for the car's end. Quote Link to comment Share on other sites More sharing options...
EnchantedScribe Posted April 23 Author Share Posted April 23 The rear sensor is the subject of discussion. It is not feasible to combine front and rear sensors since they have entirely different types of connectors. As pmcgsmurf mentioned, the component number, while extremely similar, was incorrect and really required to be the upgraded sensor. The value is 211,540 with a precision of 30 and a scale of 17. Quote Link to comment Share on other sites More sharing options...
Rudy7831 Posted April 23 Share Posted April 23 I am quite taken aback that the lengthier sensor was securely fastened. Quote Link to comment Share on other sites More sharing options...
EnchantedScribe Posted April 23 Author Share Posted April 23 Indeed, I was also astonished by that, but it did securely fasten in place. Quote Link to comment Share on other sites More sharing options...
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