Hello, with our Mercedes SLK 200 compressor (R171) the following error picture is present: At cold temperatures (<5 degrees) it either doesn't start at all or very bad. When it starts, the engine only stays running if you increase the stationary gas. On one of the last cold days, the vehicle did not even start despite (30?) start attempts. If you turn the key around, the starter runs and the engine starts up very bumpy, goes out after a few turns or l At higher temperatures - or when the engine is warm - it runs completely smoothly. The error memory was read out several times at Mercedes - every time no error was made! Since the vehicle has jumped in normal again in the past days due to the warmer temperatures, the described error could not be reproduced at the customer service - but the basically bad start behavior was noticed. All relevant who The spark of ignition is also available. After several mechanics have looked over it, one was stunned. Mercedes proposed the replacement of the crankshaft sensor and camshaft sensors - since the part costs alone are around 600 euros, we are now considering what we are doing. The new sensors were installed in test mode. However, as the error as described above, due to the warmer temperatures was not reproducible, no difference could be detected. Did any of you happen to have a similar error picture or entry in the FS? Would you let the sensors "on good luck" change and watch what happens?