My 230E 89, when gas pedal is floored doesn't get much power and RPM increase slowly even in lower gears. One more thing that when pedal is fully floored the car doesn't accelarate fast and but when i release the gas pedal a little (90% of full throttle) it gains power but still not much. I doubt the WOT is not getting activated. how to check please help. My 0-100Km is most likely in 13sec.