SLK 230 ABS BAS lights on dash.

[peter-flint]

My better half told me these warning lights are on, checked the pads for wear and all in order, nowhere near the wear sensors. Checked the fuses (L/H side of engine compartment) and found a 30 amp fuse had blown (marked Brake Boost), replaced the fuse but warning lights still on.
What is and where is this Brake Boost unit found. Is it a replaceable unit ?
Would it's failure cause the fuse to blow with no apparent lose of brake effort.

 

[NW_Merc]

I'd get the fault codes read

 

[Naraic]

As above, get the codes read. But the fuse blew for a reason. Did it blow again? It may just need resetting.

 

[jibcl500]

Take car for a short drive, turn off remove key restart and drive lights should go out.

jib

 

[peter-flint]

The fuse hasn't blown again, therefor I'm thinking the "Brake Boost" unit may be U/S.
Took it for a short run, steering turned from lock to lock, still have the lights on the dash.

 

[NW_Merc]

The fuse hasn't blown again, therefor I'm thinking the "Brake Boost" unit may be U/S.
Took it for a short run, steering turned from lock to lock, still have the lights on the dash.

You're going to have to get the fault codes read otherwise it's going to be a very expensive and time consuming guessing game

 

[peter-flint]

You're going to have to get the fault codes read otherwise it's going to be a very expensive and time consuming guessing game

Will do, Thanks to all.

 

[Liseybabyx]

Hi. I have the same problem.
Went to use the car on Thursday and the ABS, BAS & ESP warning lights all came on.
They have stayed on since after trying the lock to lock reset and checking the pads which are nowhere near the limit.
Please help.
I also charged the battery and still no luck.

Thanks in advance

Lise

 

[Liseybabyx]

Also the brake lights work as normal

 

[television]

As you have the ABS lamp on, you have a ABS fault with a wheel sensor probably at fault, You can ignore the BAS and ESP as they cannot work without the ABS working,,,,far cheaper to get a STAR read out from an Indie

 

[EmilysDad]

As you have the ABS lamp on, you have a ABS fault with a wheel sensor probably at fault, You can ignore the BAS and ESP as they cannot work without the ABS working,,,,far cheaper to get a STAR read out from an Indie

I know it's not the same car (but it's a Merc underneath), but EmilysMum's Smart put the ESC & ABS lights on. A new & adjusted brake switch sorted it

 

[antonysobey]

I had this problem and solved it completely by replacing the brake light switch located behind the footbrake under the dash.

Happened about 3 years ago , since then no further problem.

By the way, the replacement switch, obtained from a genuine Mercedes Benz garage, was marked "made in China" !!!