304 TrueDelta members own (or used to own) a 2000 or newer Mercedes-Benz GL-Class. 59 of these members
(19.4%) have reported engine repairs for their car.
A total of 147 engine repairs to Mercedes-Benz GL-Classs--an average of 0.5 per
vehicle--have been reported.
M-B insisted on reflash of ECU whenever vehicle appeared in shop. Need for reflash unknown - M-B wouldn't tell.
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 ...
False oil level warning appeared sometimes. Oil never low.
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..
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.
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.
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.
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.
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.
new intercooler hose installed per factory directive
turbo intercooler hose becoming detached
turbo intercooler hose issue.
vehicle was bought back by Mercedes on 6/27/2007
towed to dealer, intercooler hose replaced
towed to dealer, fuel pump replaced
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.
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.
intercooler hoses replaced with updated versions (diesel engine)
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).