| 1 | 0 | 3 | 4 | 3 | 4 |
2009 Mercedes-Benz M-Class repairs by problem area
Engine (36%)
Transmission and Drivetrain (1%)
Brakes and Traction Control (2%)
Suspension and Steering (15%)
Electrical and Air Conditioning (29%)
Paint, Rust, Leaks, Rattles, and Trim (5%)
Other (9%)
Chart based on 98 repairs.
2009 Mercedes-Benz M-Class engine repair cost distribution
$2500+ (3%)
$1000 - $2499 (22%)
$500 - $999 (13%)
$100 - $499 (16%)
< $100 (47%)
Chart based on 32 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2009 Mercedes-Benz M-Class
Engine not specified
| 53960 mi C $1200 |
Major engine job to fix an oil leak, partially covered by warranty. |
2009 Mercedes-Benz M-Class 4dr SUV
turbocharged 221hp 3.0L V6 Diesel 7-speed shiftable automatic AWD
| 89280 mi | Rear main seal is leaking. Losent a quart in two months. |
| 59520 mi | Still trying to diagnose the 18 faults. Looks like CDI computer. Replaced the Maf sensors but still hhave the same problem Wiring harness frayed at motor mount Both EKAS sensors defective, shutoff motor defective, EGR faulty and oil cooler seals changed, replaced ad blue tznk heater ( 2nd time in two years) |
| 68820 mi $10 |
CDI Inlet Port Shut off motor making the car going to limp mode. Remove the connector plug and insert a 4.7kohms resistor so the computer thinks it is still connected. Problem solved but MPG raised about 10%. |
2009 Mercedes-Benz M-Class 4dr SUV
turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD
| 43900 mi US $150 |
Engine failed to start, it would crank but not start. NO CEL, NO Add Blue lights. Towed to shop, where it started, no error codes were noted. Issues could not be duplicated. |
| 62000 mi US $2200 |
Diesel Exhust Fluid heater replacement. |
| Has about 14,000 miles. Back to dealer once to fix numerous small things: rear windshield wiper motor, right rear power window switch, rear seat belt retractor. What has been a nagging problem is the pollution control system. Has been back 4 times. |
| 35866 mi | NOx sensor replaced under warranty for the first time; regular cost including air cleaner turbo seal would have been $1,350.92. |
| 50843 mi | Auxiliary heater of AdBlue (Urea) tank diagnosed as defective; MBUSA claimed not covered under emissions control warranty though it would not have passed SMOG test. Dealer paid ~$2,200.- from a slush fund. |
| 60028 mi US $1351 |
NOx sensor replaced for 2nd time; also EGR Temperatur Sensor and air cleaner turbo seal replaced. $1,350.92 |
| 56633 mi | NOx sensor replaced on April 5th, 2012 had shaken loose. Dealer fixed free of charge as it was their responsibility. |
| 66241 mi US $1676 |
Turbocharger Intake Shut-off Motor was defective; no spare parts in USA available; had to be imported from Germany. $1,675.89 |
| 69000 mi US $504 |
paid for Bad Glow Plug Control Module. In addition dealer fixed free of charge Turbo Pipe Gree O-Ring seal & V-ribbed belt. Engine oil leak and damage to belt caused by previous repair. |
| 75000 mi | Temperature sensor upstream of turbo defective and replaced; $516.06 plus sales tax Replaced 3 engine mounts due to leaks; $1,778.38 plus sales tax |
| 75500 mi | Vehicle lost power and went into limp home mode on freeway. Had to dive on emergency strip and reboot car at turnout. Car caused no other trouble. No error codes showed up when dealer tested; no charge. |
| 81000 mi US $5384 |
Turbo inlet pipe seals replaced $186.01 plus sales tax |
| 82460 mi C $2100 |
Check engine light came on, emission problem diagnosed. 2nd time adblue heater needed replacement |
| 60000 mi | Oil cooler seals leaking. Fixed under goodwill warranty work otherwise it would have cost $2200 |
| 90000 mi US $1800 |
Diesel Emission Fluid tank heater |
| 72000 mi | Oil seal |
2009 Mercedes-Benz M-Class 4dr SUV
382-horsepower 5.5L V8 7-speed shiftable automatic AWD
| 44000 mi | Possible defective thermostat |
| 51000 mi | Replaced thermostat. |
| 61000 mi US $500 |
Ignition coil. |
2009 Mercedes-Benz M-Class 4dr SUV
268-horsepower 3.5L V6 7-speed shiftable automatic AWD
| 92500 mi US $1300 |
Water pump seal and bearings |
| 77500 mi | thermostat failed |
| 37000 mi US $836 |
ignition would not sense the key fob. ignition starter switch was replaced. |
| 52000 mi US $900 |
thermostat needed replacing |
| 64100 mi US $250 |
Replace thermostat. |
| 100000 mi US $350 |
Replaced camshaft sensor magnets to solve P016 problem, but to no avail. Likely causes either: Balance Shaft, Camshaft Adjusters, or Timing Chain. |
| 47000 mi US $375 |
Serpentine belt was worn and squealing intermittently |
| 31000 mi | Ignition switch failed intermittently; we'd get a readout that key doesn't match the car. Then we'd turn it off, try it again, and eventually it would work. We got a loaner, told them no rush, and repair was warranty covered. |
| 102000 mi US $320 |
Thermostat. |
See TrueDelta's information for all SUVs
See TrueDelta's information for all Mercedes-Benz models.
