2008 Mercedes-Benz GL450 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2008 Mercedes-Benz GL450
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2008 Mercedes-Benz GL450 ProblemsInternal Component Failure May Cause Rough Shifting
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.
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.
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.
2008 Mercedes-Benz GL450 QuestionsWhy isn't there a recall on the Airmatic Compressor System? (1 answer)
I've had mine repaired 2 times already and now it is out again from May, 2015 to August, 2015 and the dealer will not cover the repair and neither would my extended warranty because it specified McPherson Struts only.
2008 Mercedes-Benz GL450 RecallsMercedes–Benz Recalls 2008 Vehicles for Defect in Power Steering Oil Pressure Driving Pin
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.