Hello together, after reading several articles I checked with my SLK (200 Kopmressor, year 2002) whether there is also oil in the plug/cable. In the connection socket on the sensor the amount of 2 to 3 drops of motor oil was to be seen; the part of the withdrawn plug, which is usually in the socket and the front surface was also oily. I cleaned both and drove to the MB dealer to get an oil stop cable (cost point approx. 25 € incl.). a new sensor (cost point also approx. 25 €). Around the sensor the engine block is slightly oiled. On the plugs in the control unit everything is (still) dry. Now ask me the following questions, to which I have found no answers even after more intensive search in the forum: 1. If I have an oil stop / protection cable built in, it must really matter whether the sensor continues to sweat some oil into the connection socket attached to the sensor. At the latest the S tecker on the oil stop cable represents a barrier for the oil so that it can not crawl along in the strand. Sure, it is not the fine English type, but the oil stop cable should be sufficient, from a purely functional point of view. In other words, you can save the change of the sensor if it does not bother you that (under the cover) a light oil film can be seen around the sensor. If I install the new sensor, then it really only makes sense if it is an improved version of the old sensor (i.e. with an oil stop effect to the connection socket attached to the sensor), otherwise this starts with the oil outlet after some time again. However, this could save you the oil stop cable. Or you go absolutely safely and install a new (tight?) sensor + an oil stop cable Both sensors sin d from the same manufacturer (binder).The old sensor has the part number A 111 051 00 77 The new sensor has the part number A 111 051 01 77 Is it the case that the “01” in the number indicates a newer, improved version or does this number have no meaning in this respect, i.e. one can save the money and the exchange effort, because the new sensor also sweats oil in the connection socket after a certain time and the actually important part is the oil stop cable? someone say or write something about it. Thank you in advance!