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Mercedes-Benz GL-Class Engine Problems

291 TrueDelta members own (or used to own) a 2000 or newer Mercedes-Benz GL-Class. 57 of these members (19.6%) have reported engine repairs for their car. A total of 140 engine repairs to Mercedes-Benz GL-Classs--an average of 0.5 per vehicle--have been reported.

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-Class problems occur, check out our car reliability stats.

Chart based on 466 repairs.

Mercedes-Benz GL-Class engine repair cost distribution

Chart based on 41 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 repair histories. Log in or join us to see them all.

2008 Mercedes-Benz GL-Class 4dr SUV

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

1000 mi   M-B insisted on reflash of ECU whenever vehicle appeared in shop. Need for reflash unknown - M-B wouldn't tell. 
5000   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   False oil level warning appeared sometimes. Oil never low. 
24000   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   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 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   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   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   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-Class 4dr SUV

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

6000 mi   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

22000 mi   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

1500 mi   new intercooler hose installed per factory directive 
6000   turbo intercooler hose becoming detached 
7000   turbo intercooler hose issue. vehicle was bought back by Mercedes on 6/27/2007 
2000   towed to dealer, intercooler hose replaced 
15000   towed to dealer, fuel pump replaced 
81000 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   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

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   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   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   While taking in for PM, I observed a Power steering fluid leak, MB replaced hose / clamp under warranty, problem has not recurred. 
51300   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

10000 mi   intercooler hoses replaced with updated versions (diesel engine) 
14000   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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