limiteddi

All this time I thought the issue is in the rims as they took a good beating on horrible roads in Toronto but I just got a new set of tires and rims and it still behaves the same.

So the issue is very noticeable if I go above 110 kmh. It starts to wobble a little side to side and sometimes it feels like an extra effort is required to keep the vehicle in the lane - a very weird feeling.There is also a slght vibration that did not go away with the new set of wheels(not sure if is related). It also wobbles badly on some bumps or uneven roads and it can go few inches to the right, then left and then back into the center position within a second. It feels like its the rear side that is moving left and right.

Any clue what this may be?

cadetdrivr

The simplest cause could be a wheel, or wheels, out of alignment. This is also the easiest and least expensive to repair.

Have you done a full 4-wheel alignment since this started?

kombifan

limiteddi

I'm at 85,000 km.
I will do full alignment tomorrow and we'll see how that looks.

kombifan

BlownV8

Sounds like you could have a few problems. Bad rear shocks can make the car feel wobbly and an alignment issue can cause the front end to shake as can improperly balanced wheels.

Craigger

I just bought a 2016 GL350 and switched to winter tires. The snow clumps on the highway are making it wobble just the way your describing. Did you ever figure out what the problem was with yours?

sdwtchlvr

Check tire pressures. The higher the pressure, the more pronounced the shimmy over bumps, etc. Same issue with my 2013 550GL. Thought it was the suspension, actual tires, etc.

reg8667

are you sure there are four? I can only find front end sway bar link kits. Haven’t found any rears. If you have a link or a picture I would like to know because this is the problem on my 110k mile 2013 gl450. Floats and side to side body motion akin to plane yaw.

BlownV8

Never heard of the rears wearing out. It's most likely your rear shocks.