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2008 Mercedes-Benz GL-Class Problems and Repair Histories

70 TrueDelta members own a 2008 Mercedes-Benz GL-Class. 38 of these members (54.3%) have reported repairs for their car. A total of 218 repairs to 2008 Mercedes-Benz GL-Classs--an average of 3.1 per vehicle--have been reported.

See our lemon odds and nada odds page for more details. To see how frequently 2008 Mercedes-Benz GL-Class problems occur, check out our car reliability stats.

Want to read about specific problems behind these stats? Jump to the 2008 Mercedes-Benz GL-Class problem descriptions below.

Don't infer 2008 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 2008 Mercedes-Benz GL-Class repairs by problem area

30% of the 2008 Mercedes-Benz GL-Class repairs were to the engine, 1% to the transmission, 1% to the brakes, 14% to the suspension, 29% to the electrical or air-conditioning systems, 11% to the body and trim, and 13% to other areas of the vehicle.

Chart based on 218 repairs.

2008 Mercedes-Benz GL-Class repair cost distribution

Of the 2008 Mercedes-Benz GL-Class repairs that were not covered by warranty and were not do-it-yourself repairs, 8% cost less than $100, 21% between $100 and $499, 54% between $500 and $999, 13% between $1000 and $2499, and 4% more than $2500.

Chart based on 24 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 2008 Mercedes-Benz GL-Class 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 Texas, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Nov 2008 1000    
6000 0 Small oil leak caused by uninstalled o-ring at the factory.  
8000 0 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. 
15000 0 fuel tank locking door broken---dealer replaced switch that locks fuel door to frame 
20000 0 Left rear seat raise/lower motor defective. Replaced with new part. 
35000 0 cam shaft problem reported by check engine light 
37000 0 unknown sensor causing check engine light to illuminate; sensor replaced 
43500 0 Liftgate stuck closed and would not unlatch 
52000 0 Tire pressure monitoring system failure. TPMS System still not working after 2 failed attempts by the dealer to resolve. 
58000 0 Tire Pressure Monitoring System (TPMS): malfunction finally diagnosed and repaired. 
65000 0 Strut replaced. Had to order part from Germany. covered under extended warranty. 
72000 0 The other front strut broke and had to be repaired under warranty. 
78000 0 Electrical ignition relay replaced. Truck had to be towed on flatbed to dealer. Battery died. 
94000 0 air suspension--blown air shock on left rear. I believe this is the 3rd or 4th one of these to blow since we bought the vehicle. 
96700 0 Power steering pump and controller went out. another busted air shock--fourth time this has happened on this vehicle 
99300 0 Drivers door lock no longer worked with electric door lock--had to replace 
108000 0 Leaky oil pump needing full replacement. Also caused damage to servo motors attached to oil pump and other parts. 
Mercedes-Benz GL-Class in New Jersey, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Feb 2009 21000    
22000 0 Replaced fuel pump. 
 
Mercedes-Benz GL-Class in Ohio, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Feb 2008 0    
2000 0 Driver's window needed new motor, regulator and seals. Rear hatch intermittently not closing fully. Harsh downshifts from 3-2 and 2-1 and "crunching noise" 
3000 0 Homelink garage door transmitter not functioning properly 
11000 0 False check oil warnings displayed, despite correct oil level. Oil level sensor and bracket replaced under warranty.  Wind noise from driver's door corrected by replacing defective door seal. 
12000 0 Chrome trim strip above rear license plate and in front of tailgate handle fell off, requiring replacement of trim and housing to which it attaches. Rear tailgate not latching shut properly. Replaced latch but still not latching properly. Re-adjusted tailgate latch and seems to be working better, although still doesn't latch properly 100% of the time. 
24000 0 Oil leak  
25000 0 Release handle on second row folding seat broke off 
30000 0 Check engine light and glow plug light illuminated. Dealer found a loose bolt near the glow plug that was creating a short. 
39300 0 Check engine light came on - replaced exhaust pressure sensor. 
43000 0 Driver's window motor slow,replaced Satellite radio not working, replaced sat radio unit Rear hatch not closing properly, adjusted rear hatch again. 
44000 0 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. Dash ashtray mechanism no longer working smoothly, would pop open too quickly, spilling contents. New ashtry installed. Key developed crack and was replaced under warranty. 
46500 0 Fuel guage stopped working correcting - showing about 1/2 tank less than actual level. Faulty wire found in left side fuel sending unit. Repaired. 
52000 0 Rear latch not closing properly in cold weather. Has been an ongoing issue since Day 1. 
62500 98 2nd Row seat release lever broke off - second time this part has broken - this time not covered under warranty or extended warranty - $98 repair 
67000 0 Car was leaking oil due to failed oil cooler. Oil cooler replaced. Exhaust fumes entering the cabin. Replaced faulty exhaust gasket. 
68000 0 Car leaking oil. Oil cooler replaced again. 
68000 0 Car leaking oil again and check engine light on; car in limp home mode. Oil intercooler replaced again and seals replaced. 
69700 0 Oil/Coolant leaking again 
 
Mercedes-Benz GL-Class in Georgia, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Feb 2008 9000    
10000 0 Rear a/c not cooling properly. Passenger seat creaks when occupied. Faulty rear door seal. 
18700 0 Rear A/C not cooling from roof vents. Part ordered 
 
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 Owners manual had many missing critical pages with duplicate pages where the missing pages should have been. Manual replaced after many weeks wait. 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. While in shop for problem 1) and 4), battery drained down twice - dead battery - "SOS telaid disconnected" message had appeared in multifunction display, and no crank, no start condition (for 4 tries) had occurred earlier. Rear Signal Acquisition Module 
16000 0 Driver door handle refused to 'retract' to 'ready' position. Handle OR lock (latch) malfunction. Parts back ordered. Shop did not take door apart to confirm source of problem. 
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.. Mercedes open campaign 2008110009 update rear SAM (Signal Acquisition Monitor) software. Prevents drawdown of battery under certain conditions and sequences of using REMOTE key to close hatch and then NOT open/close doors manually. Cars with keyless go. 
26000 0 Problem per description above. Resolution: Dealer replaced door latch assys for all four doors and installed updated springs for all 4 door handle bearing brackets 
34000 0 Parking brake handle not returning to correct position after releasing parking brake. Found guide for parking brake release cable was not holding cable correctly. Replaced guide 
35000 0 Parktronic audio (rear) alarm volume too low to hear over ambient, most situations. Dealer discovered original factory sound level was set at 80%, he adjusted to 100% for rear sensors, sound is now slightly louder. Tech found L parking light bulb burned out. Removed/replaced halogen headlight to replace bulb. 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. 
56000 90 ABS light flashed, cruise control disengaged. After a short pause, able to reset cruise. Problem apparently related to wheel speed sensors/computer/modules. ABS, ESP systems involved. After flushing brake fluid, problems has not reappeared. 
56000 0 Exterior mirror, passenger side would not adjust electrically. Plug had disconnected, dealer reconnected plug. 
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. An oil cooling line from the transmission to the radiator was also replaced (not warranty either). ONE of the leaks in the steering rack supply line was fixed by replacing that line. (no warranty there either). 
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 California, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2007 0    
6000 0 Broken door handle. 
22000 0 Oxygen Sensor causing Check Engine Light to come on. Door Handle loose, needed to be secured.  
25000 0 Faulty Fuel Pump 
42000 0 Air Struts making noise (clunking), and required replacement. Dealer Replaced air strut. 
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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2008 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in Maryland, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2007 1000    
1300 0 Tele-Aid module not working. Self-diagnosed, brought vehicle in, and dealer replaced Tele-Aid unit. 
14000 0 Driver's side rear outside door handle stuck in the open position. Door would not open from either inside or outside. Fixed at dealer under warranty. 
14000 0 Driver's side exterior rearview mirror cracked spontaneously. Replaced in 30 min. under warranty. 
14000 0 Driver's side front outside door handle stuck in the open position. Door would not open from either inside or outside. Fixed at dealer under warranty. Successful repair. Speaker in the door sounded like it was "blown", 1 day after repair work on same door. Returned to dealer, was told that speaker had short-circuited, but that it was an "unfortunate coincidence" rather than damage from previous door wo 
22300 0 Keyless Go functions inop on driver's door handle. Door handle replaced under warranty; 2.5 hours. 
25700 0 Driver's side pre-catalytic converter O2 sensor short caused "Check Engine" light to illuminate. Replaced by dealer under warranty at no cost. 
30000 0 Brought SUV in for tire replacement. Asked dealer to replace left front parking lamp as well. Replacing the bulb did not fix the problem, and after diagnosis, headlamp assembly was removed to access and repair wiring harness. Repaired under warranty, Brought SUV in for tire replacement. While vehicle was up on lift, mechanic noticed fluid leakage from left rear strut. Part ordered, replaced when it arrived next day. Repaired under warranty, no cost. Right rear exterior door handle will not function with KeylessGo. All other functions intact. Part ordered. SUV wouldn't start while out running errands. Roadside assistance first jump started SUV, then later replaced battery. Brought SUV to dealer for testing, who found bad alternator cable. Part ordered. 
31000 0 SUV wouldn't start while out running errands. Roadside assistance first jump started SUV, then later replaced battery. Brought SUV to dealer for testing, who found bad alternator cable. Part ordered. Right rear exterior door handle will not function with KeylessGo. All other functions intact. Part ordered. 
32200 0 Right rear exterior door handle replaced under warranty. SUV wouldn't start while out running errands. Roadside assistance first jump started SUV, then later replaced battery. Brought SUV to dealer for testing, who found bad alternator cable. Part replaced. 
47000 0 Underbody water leak allowed water into frame, which would flow under deceleration or nose-down parking, into well where computers were located. Multiple control units, wiring harnesses, and underbody panels replaced, welds sealed,  
0 Felt strip on sunroof wind deflector came off. Dealer replaced entire deflector at no cost under warranty. 
51000 100 Keyless Go functions not working with Driver's side rear door. Door handle assembly replaced. 
55000 360 Cam magnets needed replacing, which illuminated the "Check Engine" light. Replaced in 3 hours. 
57000 1350 Airmatic compressor housing cracked. Replaced. Both exterior door handles would not operate with KeylessGo. Replaced. Second time for both handles. 
80000  
Mercedes-Benz GL-Class in Alberta, Canada
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2007 0    
2480 0 Folding Mirror drivers side stopped functioning. 
3100 0 Satellite radio stopped functioning. Shop suspects antennae, but could not fix. 
6820 0 Satellite radio stopped functioning. Dealer replaced electronic part - now works. Also replaced trim under rear window that had gap caused during manufacturing. 
9300 0 Radio control unit stopped functioning. No SAT, no AM/FM, no bluetooth. 
13020 500 No audio on radio or satellite radio - control unit blown 
13640 0 Shop replaced Audio control unit. (Second time this has been replaced since vehicle was new). Found some frayed wiring was the cause of the control unit blowing. 
14880 0 Audio system wiring was replaced. All appears normal now. 
23120 950 Power steering hose blew 
23560 0 Camshaft solenoid needed replacement 
23560 0 Camshaft Solenoid Problem recurred on other side of engine (according to Dealer). 
24800  

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2008 Mercedes-Benz GL-Class 4dr SUV

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

Mercedes-Benz GL-Class in California, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Nov 2007 1000    
3000 0 Driver door handle broken. 
4000 0 Broken driver door handle. 
6000 0 2nd trip for drivers window noise, parts ordered Squeaking driver's door seal. 3rd repair to drivers door, parts replaced this time. 
15000 0 Air compressor. 
16000 0 Rear liftgate will not close. 
24000 0 air pump 
24000 0 Another Air pump installed 
41000 0 TPMS broken when traded. 

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