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Resources for the Repair and Maintenance of your Mercedes-Benz GL450

Mercedes-Benz GL450 Models:

Image for car images Mercedes Benz 2007 2009 Mercedes Benz GL450 size thumb Image for car images Mercedes Benz 2010 2011 Mercedes Benz GL450 size thumb

Mercedes-Benz GL450 Problems

Drive Train -- Verified

Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to first gear. Our technicians tell us this is due to an internal component failure. Mercedes has released updated parts; the transmission will need to be removed and disassembled to complete the necessary repairs.

Engine -- Verified

An engine Oil leak may develop from the PCV vent housing on the valve cover and/or the inspection plate on the front of the engine.

Brakes -- Verified

As a way to increase braking performance, the brake pads and rotors are make of a softer material and may be in need of replacement after approximately 20,000 miles; owners should be vigilant about getting their brakes checked.

Drive Train -- Verified

A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.

Brakes -- Verified

It is not uncommon to encounter premature failure of the anti-lock brake system (ABS) modulator assembly due to dirty brake fluid. Our technicians recommend flushing the brake fluid every two years in order to help prevent this problem.

Mercedes-Benz GL450 Recalls (Recent)

Body, Interior & Misc., April 29, 2013

RepairPal Expert Overview:

Seat belts are secured to the vehicle body at various points using special anchor bolts. These 2013 GL models are being recalled because the anchor bolts for the second row seat belts may not have been tightened correctly during vehicle assembly. If these bolts are loose, a belted occupant my not be properly restrained in the event of a crash, increasing the risk of personal injury. Dealers will inspect the affect bolts and tighten them as necessary.

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Body, Interior & Misc., June 2, 2008

RepairPal Expert Overview:

The weld on the trailer hitch assembly may be insufficient and not support a load. If the hitch weld failed, a load may separate from the vehicle, causing a road hazard. Dealers will repair the trailer hitch. The Mercedes-Benz recall number is 2008050004. This recall began during June, 2008.

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Suspension & Steering, January 28, 2009

RepairPal Expert Overview:

Mercedes–Benz is recalling certain 2008 GL-Class, M-Class, and R-Class vehicles for a possible defect in the driving pin used to control power steering oil pressure. If the pin breaks during normal vehicle turning, the steering assist will no longer operate, causing difficulty operating the steering wheel. Dealers will replace the steering gear in affected vehicles.

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Mercedes-Benz GL450 Questions and Answers

TonyG_1, 2007 Mercedes-Benz GL450, V8, Durham, CT

What is the motor oil required fir this engine?

bengal17, 2007 Mercedes-Benz GL450, Long Beach, CA

greetings,
my problem is that it takes a little be longer than usual to go up. and as soon I take a very bumpy road start to drop the front end and then it there is a message that reads, PUMP IS G...

bobbynewman, 2007 Mercedes-Benz GL450, Madison, WI

There is an oil leak at the end of the valve cover facing the rear of the car. There appears to be a black plastic round cover about 1 1/2" in diameter where the oil leaks around. Anybody kn...

M jizza, 2007 Mercedes-Benz GL450, Chicago, IL

My front passenger side bottoms out when I hit a bump and the front suspension is operationg at a very low level and the rear is jacked up?

Visitor, 2007 Mercedes-Benz GL450, Marshfield, MA

when driving can hear water splashing when turning left or right or braking.

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Mercedes-Benz GL450 Reviews

My third GL450 2013 had for 2000 miles when front brake vibration I am told is secondary to warped rotor/pad issue. Also noisy ventilation vent drivers dashboard with whistle other gl 450 owners have same complaints about. Lastly and most dangerous is engine hesitation after going from downhill to level car attitude causing unpredictable acceleration and danger. Also and maybe related is traction warning light goes on when going down road with slight incline /decline of roadway causing negative g-force. This car is disappointment when compared to last 2 I have leased.

Sometimes my 450 will not downshift ansd once you stop it will not go into reverse until you restart thecar.

I love my GL450, I had a ML500 and sold it for this GL450 and never looked back.
Listed at $73500 with all options in 2007 a new 2011 is now over $94,000 with same options. getting priced too high

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