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Old 11-08-2001, 10:33 PM
ymsin's Avatar
ymsin ymsin is offline
Driver, Mercedes-Benz
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
Its only a knock when the brakes are applied, and then you'd feel the pressure of brakes being applied. Its irritates.

I asked the MB dealer and he thinks it could be the case of either:
1. a dirty ABS sensor, which needs to be cleaned; or
2. faulty brake relay.

I notice this morning that the knock was absent (a wet morning). So I conclude that it comes up only when its hot.

How will the strut rod mount or wheel end mount create this knock?

Thanks for the comments.

... Kerry

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