Hello,i bought a clk some months ago ,an '02 CLK 230k Everything works fine,except in some days (maybe 1 times per week or 2 max ) I wake up and go to work in the mornings as usual,i start the car,it starts normally,no unusual cranks etc but when it comes to acceleration,its very very slow,i am in 1st gear at 4000 RPM and i should "fly" but the car speeds up like a normal 100 HP one,it has no power at all,but i can hear the engine trying. The usual fix is to reset the ECU,after i do it,the car works perfect,has power,pulls like it should,and the problem is fixed for 4-5 days,after that ,same thing all over again. Now i try to reset the ECU but it does not fix the problem anymore. Ofc i will go into service with it,but just asking here to know what to expect.Also i am hoping for a DIY fix since its holiday season and can't find a service that is willing to work yet. Let me know if you need more info. I have 134k miles on it,full service done about 6-7k miles ago. ( Oil change,fuel filter,oil filter,gearbox fluid). Thank you in advance.