There was a problem with the original engine valve (AUC), 132Tkm: When buying in September 2017 the vehicle had light ignition stoppages without the MKL starting, where spark plugs, ignition cable and coil came new. A few weeks ago it started again with the ignition stoppages and this time it was also in the fault memory. I saw that sparks came from the spark plugs, so there were new ignition cables. But the problem was not fixed. The ignition stoppages are always on cylinders 1 and 4 which made me suspect ignition coils. So first ignition coil checked, then other ignition coils were installed, errors still there. Spark plugs cross-changed, no change. Then my daughter told me that the MKL always only approached when it drove over 100km/h. So she should check whether this also happened in other gears at the same speed. But this was not the case. Always at higher speed. Have already the AGR valve and the pipe extended. The pipe had at the Drosselklappe only half through and the 12G filter and the valve function was also high. In terms of compression.