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Mercedes-Benz GL-Class Engine Problems and Repair Histories

261 TrueDelta members own a 2000 or newer Mercedes-Benz GL-Class. 71 of these members (27.2%) have reported engine repairs for their car. A total of 115 engine repairs to Mercedes-Benz GL-Classs--an average of 0.4 per vehicle--have been reported.

See our lemon odds and nada odds page for more details. To see how frequently Mercedes-Benz GL-Class problems occur, check out our car reliability stats.

Want to read about specific problems behind these stats? Jump to the Mercedes-Benz GL-Class problem descriptions below.

Don't infer Mercedes-Benz GL-Class problem frequency from what you see on this page. Many lucky owners have had no repairs, and their cars are not shown.

Percentage of Mercedes-Benz GL-Class repairs by problem area

30% of the Mercedes-Benz GL-Class repairs were to the engine, 3% to the transmission, 4% to the brakes, 23% to the suspension, 23% to the electrical or air-conditioning systems, 8% to the body and trim, and 10% to other areas of the vehicle.

Chart based on 382 repairs.

Mercedes-Benz GL-Class engine repair cost distribution

Of the Mercedes-Benz GL-Class engine repairs that were not covered by warranty and were not do-it-yourself repairs, 3% cost less than $100, 13% between $100 and $499, 42% between $500 and $999, 26% between $1000 and $2499, and 16% more than $2500.

Chart based on 31 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten Mercedes-Benz GL-Class Engine problems and repair histories. Log in or join us to see them all.
Repair costs are in local units.

2008 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in Oregon, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Oct 2007 0    
1000 0 M-B insisted on reflash of ECU whenever vehicle appeared in shop. Need for reflash unknown - M-B wouldn't tell. 
5000 0 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 0 False oil level warning appeared sometimes. Oil never low. 
24000 0 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 0 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 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 0 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 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. 
98000  

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2008 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in Colorado, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Nov 2007 3000    
6000 0 Electrical codes #2193 and #0436. Replaced right 02 sensor which controls the right side heater. 
 

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2007 Mercedes-Benz GL-Class

Engine not specified

Mercedes-Benz GL-Class in Idaho, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2007 21000    
22000 0 Able to get the new parts. Installed and the problem is gone. 
 

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2007 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in Mississippi, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
0 new intercooler hose installed per factory directive 
6000 0 turbo intercooler hose becoming detached 
6000 0 turbo intercooler hose issue. vehicle was bought back by Mercedes on 6/27/2007 
Mercedes-Benz GL-Class in Vermont, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
0 towed to dealer, intercooler hose replaced 
16000 0 towed to dealer, fuel pump replaced 
81000 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. 
81000 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. 

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2007 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in North Carolina, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Apr 2007 5000    
11000 0 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 0 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... 
44000 0 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 0 While taking in for PM, I observed a Power steering fluid leak, MB replaced hose / clamp under warranty, problem has not recurred. 
51300 0 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... 
 

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2007 Mercedes-Benz GL-Class 4-door

turbocharged 6-cylinder diesel automatic AWD

Mercedes-Benz GL-Class in Texas, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2007 7000    
10000 0 intercooler hoses replaced with updated versions (diesel engine) 
14000 0 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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