Hi, after about 10 months of service I wanted to start my 90s again, because I registered it with season mark… He jumped right away, then drove about 1000 m slowly without much speed, until suddenly the engine started stuttering and vibrating. After starting it he runs quite well for a few seconds until he starts stuttering and vibrating strongly and then also completely runs out…. Before I put it off last year, I did a engine room wash and got the Mo torraum waxed… after that he had the same symptoms as now, however, these were gone again after the drying of the ignition distributor… I then drove it still nice warm and then turned off…. Now the question is what the reason for the problem can be…. Can it be that something is wrong with the engine room wash and the wax??? I put the oil lid off and looked inside…. somehow it seems to me that the oil looks rusty… as if rust particles are in it n… I’m not quite sure. Oil was changed the same day that I mowed the car… I took off all the ignition cables, cleaned, because I thought it might be a contact error of the cables. (order when plugging together afterward noticed) Did anyone have a few ideas??? I found a lot to problems with the NG in the SuFu, but nothing to my problem…. Greeting Hannes