I was driving to a friends house 10 miles there 10 miles back mix driving. Driving there was fine. On the way back it was raining hard (probably nothing to do with it). Right from the start I notice the ML working hard at first I though it was the rain. But then I notice burn metal smell like grind metal smell. I stop and notice the driver side front wheel well had a little smoke and I can feel the heat from the break disk. This would be normal if I just came down a mountain and was breaking for like 10 miles. But I wasn't coming down a mountain and the other break disk did not have this heat problem. From this I concluded that the break on the front driverside was on even when I was not breaking hence the grinding metal smell and heat on the disk and the car seem to require more power. So I though the break may be just stuck close. So I drove very slowly pumped the break and start and stop the car. I though it got a little better and start driving home. The car seem to be driving at times requiring more power and some times fine. When I was almost home I notice I had to press the break peddle more and more until it feels like I have no break this is when the esp bas light came on.



What do you folks think is wrong. I have replaced the Break Light Switch maybe 30K miles ago (it only have 50K now) and at that time the ESP/BAS light came on too (I could be mistaken it could be the ETS light that came on last time). I also remember having breaking performance problems but I don't remember having to press the break all they way down to stop. But last time replace the switch solve all the problems.

Could the break light switch cause all these problem I am describing this time???

thanks so much.

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987