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Why is my 1994 E-Class revving every 15 second?

My 1994 Mercedes-Benz E-Class Coupe 2.0 is revving every 15 second without any input from my right foot. What's the issue?

Asked on 24 July 2018 by Stephen Northcott

Answered by Keith Moody
This is a very common fault with these cars. The first thing to do is check for a leak in the vacuum hose. You could then try cleaning the throttle body and butterfly. It's a long process and we'd recommend doing one thing at a time and checking it to see if solved your problem. It's not uncommon to find you need a new air temperature sensor or throttle actuator.
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