Have a huge problem with my Smart fortwo Built. 2000 / 110500 km and don’t know any RAT anymore. Top speed 80 km/h and hardly a suit. I changed all 6 spark plugs. Sounds from the engine OK. also runs quiet. ADAC was on site and has read out control unit. No errors. Turbocharger works, various values in the green area. ONLY air/split supply ??? too low if I understood it correctly. He meant it can only be the suction tube pressure sensor, or the air mass meter. Wanted to order the parts at SC, whereby my BENZINER has no air mass meter. EGAL !!!. Can someone help me further, am RATLOS. Which part is now advisable to replace. Mfg SILAM…. PS. Stems from the Westgate is connected and can be moved well. Have suck/blasted at the rear partial load valve, lets me suck and blow through (can also have something to do with it)?