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.
  • Go back-and-forth until satisfied
    Rate the answer you receive.
Ask Robert Your Own Question
Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 5508
Experience:  Fully qualified / self employed garage technician in the UK
Type Your Car Question Here...
Robert is online now

I am driving a ML270 CDI. From time to time, when slowing

This answer was rated:

Hi there, I am driving a ML270 CDI. From time to time, when slowing down and stopping before a traffic light, the brake light starts flashing and beeping, then the car is stuck on 1st gear (Limp mode?) When I stop and restart the car- problem is gone.. Please help
Assistant: Have you checked the brake fluid? How's the level and when was it last changed?
Customer: I have not checked it, I did change front brake discs and pads recently, but I do not know if they have checked it
Assistant: What is the model/year of your Mercedes?
Customer: Ml270 CDI 2000
Assistant: Are you fixing your vehicle yourself? What have you tried so far?
Customer: I went to diagnostics, but they said it is showing no errors
Assistant: Anything else you want the Mechanic to know before I connect you?
Customer: No
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
Thank you!
Customer: replied 1 year ago.


Ideally the garage has to plug the car in and try to replicate the issue that your seeing and capture the event or codes that are me going by what your saying i maybe leaning towards a faulty brake switch,it doesnt just activate your brake also send info to the ecu when your slowing down.trim might be worth looking at that.wiring to it...

Customer: replied 1 year ago.
Hi, thank you for your reply. It is actually the hand brake sign on the dashboard that starts flashing and beeping. Is it possible that this is from a brake switch still? The car goes into 1 gear. Thank you

It still possible that the switch is at fault albeit intermittent..when you coming to stop or full stop or pressing the brake pedal the gearbox is actually kicking down obviously,to first..unless you have an issue in the valve block on the difficult to say over the 2 but the brake light switch issue and then the fault recitifing itself after ignition reset is quite common on the ML's thats why it best to inspect the switch on the pedal box,wiring to it,or get it on live data or have the mechanic drive the car,whilst its plugged in to capture the fault..

Customer: replied 1 year ago.
Ok, I see. I will buy a new brake light switch. Do you think it might be possible because of this fault the car to be stuck in 1st gear when it happens, not changing gears before I restart the car? Thank you very much

Its still possible yes for the car to be in limp mode/stuck in first gear , until your reset with ignition... before you actually by another would be best advised to have it diagnoesd properly and confirm the fault...

Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 5508
Experience: Fully qualified / self employed garage technician in the UK
Robert and other Car Specialists are ready to help you
Customer: replied 1 year ago.
Thank you

Your welcome..if you need anything else or need advice..then just ask..