Hello guys, I have a R129, SL500 built in 1994. For a long time I have had problems with the engine speed in idle mode. After futile and expensive attempts at Mercedes directly this could be fixed last year by a small workshop by a new distributor finger and cap. Unfortunately this problem now occurs again reinforced, the speed fluctuates during idle but also when driving downhill between 500 and almost 2000 u/min. If or give me a tip who can help me in the area Dresden. I don’t want to go back to Mercedes, because all parts are confused and I have to pay for them! Thank you!