Relatively new to Merc ownership (Nov. last year) so this may be a silly question, but here goes:

When I first start up and pull away, after just a few seconds/yards travelled, a distant "whirring" can be heard, and a vibration felt through the brake pedal. Just the once, then all is OK. Is this normal, some sort of adjustment the brakes have to make upon start up? Or do I have something else to worry about?

Thanks, guys

Stevey
1995 E220 estate (wagon)