R170 SLK 200K - acceleration fault

grahamwoodward

Senior Member
Joined
May 9, 2010
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Age
73
Location
Midlands
Website
www.gwoodward.co.uk
Your Mercedes
W211 E320 (petrol) Avantgarde Saloon (2004); CL203 CLC180 Kompressor Sport (2008)
Hi. My SLK has developed an odd fault. When you accelerate hard the car speeds up fine but then starts to accelerate on its own. It doesn't stick at one speed but accelerates, even with your foot off the pedal. It keeps going until you brake hard then it resets itself. It's seems to be OK if you stay below 50mph. Anyone got any ideas? The car is reporting a vehicle speed error signal. I've been told it may be the main brake control unit.
 

joderest

Senior Member
Joined
Apr 16, 2018
Messages
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Your Mercedes
ML270 2003
sounds like a fault with cruise control, as hitting brake cancels cruse control.
I would get that looked as ASAP.
 
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