Parking brakes wont return after release. The foot mechanism needs a little help to return. I lubricated the cable in infront but could not lubricate the mechanism as it had a cover and i cant figure out how to remove it. I havent looked in the backside(rear wheel). Anyone encounter this with the GLK?

__________________
'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles