Acworld34

I starting seeing fliud spots in the rear of my car and noticed a leak see picture.

Anyone know what this is? it is not gas. nor does it looks like it coming from the brake lines.

2015 Mercedes S550 with 70K miles

I am wondering if i should stop driving. I am taking to the shop on Monday.

picture from the rear.

VII

Unless this is water (disappears if car is not driven without leaving marks) you likely have a serious problem and should stop driving the car.

SilverArrow44

Based on the location, I suspect that one or more of the rear differential seals has failed. Alternatively, an axle boot could have torn open and tossed grease everywhere. I would caution against operating the vehicle as usual until it's fully repaired. If you drive with too little fluid in the differential for too long, it could cause severe damage to the gears and bearings. And if it's a torn boot, you risk damaging an axle shaft.

Katie22

maybe lower the cover and inspect the car for leaks.

JB-HTX

Get some fluid on your finger and smell it... differential fluid has a very distinct and strong oil smell. Had a rear diff leak on my S430 and took it to the shop the same day.