Join Date: Jun 2014
Location: Sussex UK
Vehicle: 2005 SLK350
Other Toys: 530i E61 M Sport Touring
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First Post BAS ESP Light Question
Following an MOT test I have had intermittent BAS/ESP light showing and very occasional ABS light too. I changed the brake light switch, no difference. Also tried the lock to lock trick many times, also no difference. I then had the codes read (of course the lights all stayed firmly off when I took the car in). Codes recorded were a few for offside rear sensor and one for steering angle. I suspect something in the MOT test triggered it so either jacking the car and loosening a wire or turning steering rapidly.
So, first step was to check the connections to offside rear wheel sensor. Now, here is my question: If this sensor had failed, would I not get ABS light as well as ESP/BAS? I tried unplugging it and the ABS light comes on too as I would expect. I don't want to change the sensor if this rules it out. I suspect more the steering wheel sensor for the main problem of the BAS/ESP and the code recorded for rear sensor being just for the brief period when the ABS light came on too.
Any info appreciated. Thanks