How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask mike_a_mechanic Your Own Question
mike_a_mechanic, Mercedes Mechanic
Category: Mercedes
Satisfied Customers: 5471
Experience:  17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
Type Your Mercedes Question Here...
mike_a_mechanic is online now

slk r170 speed limter not working sounds 3 bleeps /sometimes

This answer was rated:

slk r170
speed limter not working sounds 3 bleeps /sometimes OK
sometimes starts and run aprox 3min then or at stop street and car will go into a slow throttle response and some times no response if i turn off engine wait 1/2min turn on and start all is ok for that period of driving ,
Hello, welcome. My name is***** will do my very best to assist you with your question. I apologize if you have been waiting long for a response.
From what you are describing the issue that you are having is consistent with a failure of the turbine speed sensor which sits behind the valve body inside the gear box. This is a common issue on these vehicles and requires the sensor to be replaced.
Customer: replied 3 years ago.

thanks mike i will send to agent for code test and wait there reply as i don't have garage clean enough to repair this type of problem will get back to you with codes and hope this is the fault

thanks les

No problem, thank you. Also you can respond back to this question at anytime after rating positive if you need further help.
mike_a_mechanic and other Mercedes Specialists are ready to help you
Customer: replied 3 years ago.

hi mike car has got ESP and ABS light on! i think it is in limp mode? have take to garage this morning to have it fixed does this sound like the turbo speed sensor problem or some other sensor,



Yes this does sound consistent with the turbine speed sensor. Thank you.
Customer: replied 3 years ago.

agents have changed the abs sensor on rear wheel it worked for 1hr then on the following day the same problem slow/ some times NO response on the throttle and somtimes no speed limiter

speed cruise is unaffected the ABS ESP lights are now off

please help your idea was the turbine speed sensor in gearbox is there some way to check this without removing from car



No the turbine speed sensor will have to be removed in order to test this, and your issue is consistent with this sensor failure.