Mercedes-Benz GL Mercedes-Benz GL

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Mercedes-Benz GL repairs by problem area

Engine (30%)

Transmission and Drivetrain (3%)

Brakes and Traction Control (4%)

Suspension and Steering (24%)

Electrical and Air Conditioning (23%)

Paint, Rust, Leaks, Rattles, and Trim (7%)

Other (9%)

Chart based on 560 repairs.

Mercedes-Benz GL engine repair cost distribution

$2500+ (10%)

$1000 - $2499 (29%)

$500 - $999 (35%)

$100 - $499 (22%)

< $100 (4%)

Chart based on 49 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2015 Mercedes-Benz GL 4dr SUV

turbocharged 429hp 4.7L V8 7-speed shiftable automatic AWD

2000 mi Check Coolant warning light two days in a row at startup. Drove into the dealership service bay, reported the problem, they topped-up the coolant reservoir with factory-specified coolant and we were on our way. 
4000 mi A "Check Engine" light came up. Problem traced to the fuel cap sensor. It was resolved (not sure what was done - probably fault codes reset only. 

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2015 Mercedes-Benz GL 4dr SUV

turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

18500 mi Ad blue leak at engine. 

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2014 Mercedes-Benz GL 4dr SUV

turbocharged 429hp 4.7L V8 7-speed shiftable automatic AWD w/low range

48000 mi Cooling hose was loose. Replaced hose and fluids. 

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2014 Mercedes-Benz GL 4dr SUV

turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

12000 mi Replaced faulty exhaust particulate sensor. 
23600 mi CEL light on. Replaced Soot Particulate sensor. 
25400 mi CEL light on. Replaced EGR sensor 
12400 mi CEL ON and NOX SENSOR Replaced 

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2011 Mercedes-Benz GL 4dr SUV

turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

50895 mi

US $3795
Oil leak from the rear air sealer. 
57040 mi Major engine problem which started with timing chain, injector repair, cylinder damage. In end MB performed and engine rebuild. 

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2010 Mercedes-Benz GL 4dr SUV

turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

60000 mi

US $3500
leaking oil - replaced all seals on top half of engine and turob 
70000 mi

US $650
replaced serpentine belt and tensioner 
72500 mi

US $5500
turbo failing - adblue tank failure (heat) - Mercedes covered all parts out of warranty - i had to head labor 
72000 mi

US $1600
replaced oil temp / coolant temp sensors / replaced battery 
17680 mi Turbocharger oil line replaced due to leak 

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2009 Mercedes-Benz GL 4dr SUV

turbocharged 221hp 3.0L V6 Diesel 7-speed shiftable automatic AWD w/low range

109120 mi

C $6000
Intake failed, needed to replace whole air intake system - known problem with Bluetec engines 

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2009 Mercedes-Benz GL 4dr SUV

turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

15451 mi Check Engine light on. Replaced temp sensor. 
25462 mi Temp sensor from NOX replaced 
41421 mi

US $180
Replaced NOx sensor 
49841 mi

US $1045
Oil cooler gaskets replaced. 
66500 mi Ad Blue sensor shorted. 
68000 mi Glow plug failed. Dealer did not have one in stock and it took 3 days to get one. 

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2008 Mercedes-Benz GL

Engine not specified

70000 mi

US $650
Have had severe fuel pump problems that have caused to cease while driving at high speeds; Morristown MB unable to rectify after 4 attempts including replacing fuel pump; Open Road Bridgewater repaired in one day. 

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2008 Mercedes-Benz GL 4dr SUV

turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

58000 mi Seal on top of the engine also leaking. 
89300 mi

US $14
Oil differential pressure switch replaced. Oil leak repaired, broken oil cap. 
38000 mi engine was leaking oil around the oil separator seal at the turbo charger port. seal needed replacing. 
40000 mi turbo intake seal leaking, had to order part turbo intake seal replaced and oil spillage over engine was cleaned up now turbo oil separator seal leaking oil down side of engine onto exht. pipe Heat shield and exhaust particulate filter rattling and leaking exhaust. 
49700 mi

US $400
engine oil cooler broke, leaking oil, effect: rising engine heat and yet another mess on the garage floor from the most unreliable and problematic vehicle I have ever ever owned! 
97000 mi

US $600
The car was losing power. I thought it was another fuel pump, but it turned out to be some sensor. 
65000 mi White Smoke Billowing out of car on highway. Resolution was it was a routine active particulate filter burn - with NO notification to the driver - thought my car was burning up or a blown head gasket. 
64400 mi

US $405
Replace all Glow Plugs The "computer" now says the glow plug conrol module needs to be replaced for $400 just a week after I replaced all of he glow plugs for $900 
14000 mi Leaky oil tube and diesel fuel line 
56000 mi

US $2000
Power door locks went out, O rings on engine leaking 
170000 mi

US $800
Replaced oil cooler seals as preventative as they began to have a slow leak, replace water pump, belt and tensioner, both idler pulleys while I was in there. 
6700 mi Low oil level. Drove to dealer and refilled with no charge. 
15000 mi ABS/Engine warning lights + skidding occurred. Crankshaft sensor faulty and replaced under warranty. 
94000 mi #3 cylinder injector leak. Replaced injector and fuel hose. 
95000 mi

US $2200
Turbo seals leaking. 
105000 mi

US $307
Fuel line came loose. Was reclaimed and new fuel filter installed. 
105700 mi

US $1100
Replaced motor and transmission mounts. 
35000 mi oil leak from deep in engine. required much labor and seals and gaskets as well as pipe sockets 
35000 mi Previously reported as"repaired" engine oil leak continued. Dealer claimed there was no leak! Would urge anyone buying a this model to have an extended warranty and be ready for frustration. 
97300 mi

US $135
Glow Plug controller 
80000 mi temp exhaust sensor replaced 
38000 mi 2) Oil level sensor needed adjustment to prevent false low oil level indications. No parts needed. 
70000 mi Engine stalled at stop light. Barely started. Drove to dealer next day. Determined to be a crank sensor and was replaced at no charge due to extended warranty. 
15000 mi Rough downshift (repaired under warranty with factory spec computer download) 
19000 mi Fuel pump faulty. Engine shutting off intermittently. 
31000 mi

US $350
leaking oil 
32000 mi Car loses oil. Recurring problem. Each time I replace lost oil, the oil cap fails and spews oil on engine until warning light comes on.  
6000 mi Small oil leak caused by uninstalled o-ring at the factory.  
8000 mi another leak in engine caused oil to drip onto timing belt, breaking the belt and shutting the engine down on the Interstate Highway. Vehicle hauled to dealer on flatbed for repair. 
35000 mi cam shaft problem reported by check engine light 
37000 mi unknown sensor causing check engine light to illuminate; sensor replaced 
78000 mi Electrical ignition relay replaced. Truck had to be towed on flatbed to dealer. 
108000 mi Leaky oil pump needing full replacement. Also caused damage to servo motors attached to oil pump and other parts. 
110700 mi

US $500
Honestly I cannot remember the exact repair but it was something either to do with the power steering or ignition system. Cost me another $500. 
22000 mi Replaced fuel pump. 
11000 mi False check oil warnings displayed, despite correct oil level. Oil level sensor and bracket replaced under warranty. 
24000 mi Oil leak  
30000 mi Check engine light and glow plug light illuminated. Dealer found a loose bolt near the glow plug that was creating a short. 
39300 mi Check engine light came on - replaced exhaust pressure sensor. 
44000 mi Check engine light came on and engine died while driving, with loss of power steering. Car had to be towed to dealer, both fuel pumps needed to be replaced. Seems to have resolved issue. 
67000 mi Car was leaking oil due to failed oil cooler. Oil cooler replaced. Exhaust fumes entering the cabin. Replaced faulty exhaust gasket. 
68000 mi Car leaking oil. Oil cooler replaced again. 
68000 mi Car leaking oil again and check engine light on; car in limp home mode. Oil intercooler replaced again and seals replaced. 
69700 mi Oil/Coolant leaking again 
1000 mi M-B insisted on reflash of ECU whenever vehicle appeared in shop. Need for reflash unknown - M-B wouldn't tell. 
5000 mi Improper "check engine oil level at next fillup" message appears often (3-4 time in 70 mi trip). Oil level always OK. Dealer says sensor defect causes message. No new (redesigned) sensors available. Problem is NOT new - 2007 CDI engines often had same ... 
15000 mi False oil level warning appeared sometimes. Oil never low. 
24000 mi C/S Low oil level warning in I/C again. Oil level not too low. Repeat of problem previously 'repaired'. Oil level sensor replaced with sensor with new part number. Oil pan replaced because original oil pan warped when it was removed - too much sealant.. 
35000 mi MORE new software updates for rear SAM module. Newer software available and installed on top of new software previously installed. All values and coding checked out correct both before and after update. 
52000 mi

US $1671
CEL on >2 wks. Local indy couldn't diagnose. Dealer found servomotor failed. This servo drives an air door inside intake manifold [provides engine braking?]. Servo was reported to have failed because oil dripped onto shaft, parts seized. 
76000 mi CEL appeared. 1st trip to dealer found that diff pressure sensor at DPF filter failed high. Sensor replaced. Fault would not clear. New DPF ordered.  2nd trip DPF replaced. Same day CEL reappeared. 3rd trip found temp sensor found unplugged during DPF repair and not plugged back in. 
95000 mi

US $3000
Bad oil leak from center of engine rear. O ring seals to oil cooler had failed - a defect known to Mercedes and the subject of a TSB. Dealer replaced seals with new design. 
100000 mi

US $65
Car stopped without warning while driving. After waiting, car started and ran normally but with MIL set (check engine symbol). Dealer ran diagnostic on fuel system and determined MIL was due to low fuel pressure. Fuel filter was NOT plugged. 

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2008 Mercedes-Benz GL 4dr SUV

382-horsepower 5.5L V8 7-speed shiftable automatic AWD

40000 mi

US $750
Check engine light and fuel low warning when fuel not low. Dealer replaced hose and carbon filter in fuel system. 
52000 mi

US $800
Camshaft sensor (one of two bad) 
22000 mi Oxygen Sensor causing Check Engine Light to come on. Door Handle loose, needed to be secured.  
25000 mi Faulty Fuel Pump 
6000 mi Electrical codes #2193 and #0436. Replaced right 02 sensor which controls the right side heater. 

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2008 Mercedes-Benz GL 4dr SUV

335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range

23560 mi Camshaft solenoid needed replacement 
23560 mi Camshaft Solenoid Problem recurred on other side of engine (according to Dealer). 
59000 mi

US $750
Camshaft sensors replaced 
19000 mi Recall for some faulty sensors that caused check engine light to come on. 
35000 mi Oil plugs had a slight leak, replaced them. 
50700 mi

US $1700
2 camshaft sensors replaced 
26000 mi Driver's side pre-catalytic converter O2 sensor short caused "Check Engine" light to illuminate. Replaced by dealer under warranty at no cost. 
55000 mi

US $360
Cam magnets needed replacing, which illuminated the "Check Engine" light. Replaced in 3 hours. 

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2008 Mercedes-Benz GL 4dr SUV

335-horsepower 4.7L V8 7-speed shiftable automatic AWD

66000 mi

US $170
replaced camshaft position sensor 

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2008 Mercedes-Benz GL 4-door

turbocharged 6-cylinder diesel automatic AWD

42000 mi 3 fuel injectors failed. 
50000 mi Engine developed ticking noise. Dealer confirmed the noise, replaced all injectors, problem not solved. Dealer then claimed noise is normal. 

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2007 Mercedes-Benz GL

Engine not specified

22000 mi Able to get the new parts. Installed and the problem is gone. 

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2007 Mercedes-Benz GL 4dr SUV

turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

64000 mi Car stalled while driving multiple times. Replaced crankshaft position sensor. 
66000 mi

US $1000
Fuel pump intermittent failure.  
79300 mi

US $600
Glow Plug Control Module failure. Replaced 
140000 mi

US $950
Radiator developed a leak and had to be replaced. 
20000 mi Oil sensor was showing low oil even though oil was full. Software reflash solved problem. 
3000 mi Hose on turbocharger blew off in the mountains of Colorado on Mother's Day, forcing my wife to manually-shift the truck (full of kids and dogs) all the way back to the Phoenix area. When I picked it up the next day, it blew off again, but not since. 
83000 mi

US $2979
Turbocharger failed, erratic driving followed by limp mode. This vehicle had the intercooler hose failure three or four times but supposedly that's unrelated. Broken bolts on removal extended repair time (shop broke them). 
5185 mi Complained that trans upshift SOMETIMES did not function as expected given similar load-speed conditions. Dealer diagnosed, "no DTCs, no newer DTC software available, No correction required". No time to install newer ECU software just available. 
8341 mi Visit to install new ECU software. Software installed. No effect on upshift 'hanging' problem. Dealer test drove w/ instrumentation attached and agreed that "adaptation" settings/results were wrong for transmission. Performed adaptation, no effect on prob 
9814 mi Visit to install another new valve body. Installation/adaptation successful. At this same visit, dealer replaced under warranty the processor card for the COMAND NAV system. System had sometimes told driver to make a 'U-Turn' before destination was reache 
1500 mi new intercooler hose installed per factory directive 
6000 mi turbo intercooler hose becoming detached 
7000 mi turbo intercooler hose issue. vehicle was bought back by Mercedes on 6/27/2007 
2000 mi towed to dealer, intercooler hose replaced 
15000 mi towed to dealer, fuel pump replaced 
81000 mi

US $1250
CEL was coming on and the car turned off multiple times while driving. CEL would turn off after a day. Took car to dealer. Dealer could not replicate the problem. Nothing was fixed on the car but it does run normally at the present time. 
88000 mi

US $2300
Vehicle intermittantly shuts down. Fuel pump was replaced but it did not solve the problem. Dealer could not find cause of problem. Vehicle traded in. 
54000 mi Serpentine belt broke due to harmonic balancer failing. MBUSA reviewed bill and part on request and paid completely even though out of warranty. It was due to defective part. 
85000 mi

US $239
Oil Cooler seals leaking. Remove and replace. 

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2007 Mercedes-Benz GL 4dr SUV

335-horsepower 4.7L V8 7-speed shiftable automatic AWD w/low range

45000 mi ignition cylinder would lock and not turn properly with both key fobs. part replaced under warranty 
31000 mi Engine low coolant appeared on and off. Apparently loose sensor found. 
31500 mi Top off coolant light comes on repeatedly. 

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2007 Mercedes-Benz GL 4dr SUV

335-horsepower 4.7L V8 7-speed shiftable automatic AWD

5585 mi Car began running rough, check engine light came on and eventially would not start. New software for engine and transmission computers added. 
60000 mi Engine oil leak cured by replacing three camshaft plugs in cylinder head. False low engine oil warning message cured by replacing oil level sensor. 
79000 mi Replaced crankshaft position sensor Stored code indicated problem with transmission ECM although no symptoms obvious to driver. 
15000 mi Warranty claim- engine check light came on over X-mas Holiday. One cylinder not firing. Dealer replaced overcoil / leads. Problem resolved as of 12/28/07 
26000 mi CEL came on... dealer replaced cam position sensor... 1 week later problem re-appeared... fuel injector replaced... it has been 3 weeks with no issue... problem presumably resolved... 
45000 mi Cylinder head port plug (not spark plug) failed causing oil to leak out. Nuisance defect. Dealer 'repaired' /patched plug while in the interim of getting new parts on b/o. Will repair under warranty 
47000 mi While taking in for PM, I observed a Power steering fluid leak, MB replaced hose / clamp under warranty, problem has not recurred. 
51300 mi Check engine light... looked up code and got a 'fuel too rich' code. Dealer diagnosed problem to be one of the O2 sensors. Replaced under extended warranty... 
23000 mi Took in to fix oil leak. It was in the shop for four days and seamed to go away. Still leaves oil stains in my garage. I will be taking to the shop again for the fourth time this week. Will report the outcome. They did fix the blown speaker. 
23000 mi Still has oil leak. Tire pressure light comes on and tire appears to slowly lose air. I will take the car in this week for the fifth time in three months. Loathe this car. 
62600 mi Loud noticeable thumping engine noise prompted us to take the truck to the dealership and after 60 days (and counting), we are now told that we will get a new engine! 
25000 mi Cam shaft sensor caused check engine light to come on. Dealer replaced sensor. 
29000 mi Camshaft magnet sensor, again, went out. I guess there are 4 total, I have now replaced 3. I'm sure I'll be heading in again one more time. 
104000 mi

US $6000
Intake Manifold tumbler flap Water pump, thermostat, utility belt, pulleys (2x). The thermostat kicked-off the cycle. Once that was replaced, the water pump displayed symptoms, and the rest followed. 
108000 mi Check engine light 
36000 mi Transmission got stuck in one gear and only reset after turning off ignition. Happened three times. They could not replicate or find a fault code but updated the software. Has happened once since and waiting to drive to dealer while it is occuring 
39000 mi Previous problem with transmission. Left vehicle with the dealer and they were able to replicate the problem and fix. 
89000 mi

US $1500
Fuel guage inaccurate. Replaced both fuel senders and fuel pump. Problem fixed. 
37409 mi

US $186
Cam plugs leaking 
56500 mi

US $1000
Replace Cam Plugs and Centrifuge 
67400 mi

US $400
Replace thermostat 
67400 mi Oil leak 
41000 mi Had a minor oil leak on one of the gaskets, not enough to even register low oil.  
49000 mi cam timing sensor replaced under warranty 
50000 mi after rough idle at start up, engine light came on. Diagnosis was bad fuel. Dealer reset light and found no problems. 
58000 mi overheated. thermostat replaced. 
26000 mi Camshaft sensor failed. 

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2007 Mercedes-Benz GL 4-door

turbocharged 6-cylinder diesel automatic AWD

10000 mi intercooler hoses replaced with updated versions (diesel engine) 
14000 mi Check engine light came on, GL shut down. Restarted and drove but check engine light remained. Took in next day for service. Part ordered from Germany so Gl sat for 4 full business days before part arrived. New part was fuel rail (diesel). 

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2007 Mercedes-Benz GL 4-door

turbocharged 6-cylinder diesel automatic 4WD

31620 mi Air mass sensor replaced. Apparently a factory fault. Part modification. 
63240 mi Pressure regulating valve, crankcase ventilation leaks, air filter element blocked 
89900 mi

R 240
Water entered the well area below passenger seat where the electronics are housed. All shorted out. Source of water leak not determined. 

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Mercedes-Benz GL Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently Mercedes-Benz GL problems occur, check out our car reliability stats.