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hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
93,032 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Mercedes-Benz R350 engine problems

engine problem

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2006 Mercedes-Benz R350 Owner Comments

problem #13

Jul 192016


  • 100,000 miles


This is a well documented issue but Mercedes Benz refuses to acknowledge the balance shaft as a defect and road safety hazard. Unfortunately it's going to take someone's engine falling a part at high speed causing an accident before someone will do something which is terrible. Mercedes-Benz balance shaft problems and how to check your car. Balance shaft Mercedes V6 and V8 problems Mercedes-Benz V6 and V8 engines had timing chain problems caused by balance shaft and idler gear failures. Mercedes produced certain models with defective gears in their balance shafts (M272 engines) or with defective idle gears ( M273 engines). These faulty gears wear out prematurely, excessively, and without warning, causing the vehicle to malfunction, the ┐check engine light┐ to remain illuminated, and the vehicle to misfire or stop driving.

- Philadelphia, PA, USA

problem #12

Dec 102015


  • 88,000 miles
Vehicle cranks but will not start, dealer first replaced fuel pump ($1500),then when came to pickup vehicle would not start at dealer, replaced starter(no charge), drove for 2 weeks issue came back, took to dealer, they kept it for 20 days and said some sort of control module, but who knows. Its been 15 months and car just stopped smack in middle of freeway at 60 miles per hour and would not start. Currently at dealer.

- Seattle, WA, USA

problem #11

Dec 012015


  • 88,000 miles
Wiring from engine harness to fuel pump burnt on freeway, engine stalled and shut down, could not start back up in middle of I5 freeway. Repairs are amounting to $4000. Could have burnt entire vehicle and after reading numerous complaints with exact same problem something needs to be done.

- Seattle, WA, USA

problem #10

Aug 012015


  • 130,000 miles


The contact owns a 2006 Mercedes Benz R350. The contact stated that while reversing, the vehicle made an abnormal noise as the steering wheel seized and smoke started to emit from under the hood. The contact turned the engine off but the vehicle failed to restart. The vehicle was towed to an independent mechanic. The technician diagnosed that the power steering pump, serpentine belt and idler pulley needed to be replaced. The vehicle was repaired. However, the contact stated that the check engine light stayed on. The manufacturer was made aware of the failure. The approximate failure mileage was 130,000.

- North Andover, MA, USA

problem #9

May 082015


  • 92,105 miles
While I was driving, I lost power steering. I had to pull over and saw that my engine belt was off my engine and a pulley came off my engine. This is after the dealership had already replaced my belt just less than 10,000 before. It was a good thing that no one was hurt. It seems like this engine is defective and Mercedes Benz refuses to fix the problem. I'm afraid that someone who does not know how to handle the loss of power steering will be in a fatal accident.

- Overland Park, KS, USA

problem #8

May 052015


  • 91,000 miles
My engine light came on - took the car for repair and was told P codes 0016 and 0017 were coming on meaning there was a defective gear in the balance shaft which mb knows about and refuses to take responsibility for. It would cost $6000 to fix. I began to look on the internet to see if any recalls or issues like mine have occurred with others and I found I was not alone and a class action lawsuit had been filed. I want to file a formal complaint as mb should be help accountable for knowingly providing faulty products to customers - they need to be liable to recall and fix every engine affected by this!! the us government needs to protect consumers better than this!

- Enterprise , AL, USA

problem #7

Sep 172014


  • 116,000 miles


Engine balance shaft wears excessively to the point where some teeth are almost gone. Causes check engine light to come on and excessive knocking as affects ignition timing. Repair is extremely expensive as it requires taking the engine out. If left unfixed it may stall the engine during driving and be a safety hazard. Research on the issue online shows potentially this issue affecting a large number of vehicles using the same engine.

- Palatine, IL, USA

problem #6

Nov 132013


  • 55,000 miles
The car rises up on one side when put thrust he computer no error code comes up. After a day or so sitting in the garage gets back to normal. Got it checked by mechanic no leaks. Then happened again they reset the computer charged me. Happened once again this time they changed the computer and the car showed airbag leaking. Car is out of warranty. Looked up on line mostly everyone who owns this car has this problem. This car has lot of issues. It stopped in middle of road on high way I was luckily saved but they said a shaft ring broke in the engine I had to pay $2000 dollars. Mercedes should recall R 350 for suspension leaks.

- Schnecksville, PA, USA

problem #5

Oct 032013

R350 6-cyl

  • 119,000 miles
My engine light came on and my car began to idle really high when parked or at a stop in October. I went to two Mercedes dealers to check on the issue. The second Mercedes dealer/service center validated the first, explaining it was the engine balance crankshaft that was loose in the engine and it would cost $6000 to fix. I began to look on the internet to see if any recalls or issues like mine have occurred with others and I found I was not alone and a class action lawsuit had been filed.

- Iowa City, IA, USA

problem #4

Apr 242013

R350 6-cyl

  • 72,243 miles
The contact owns a 2006 Mercedes Benz R350. Regular service and maintenaince has been performed by the dealer only. The contact stated that while driving at highway speeds, the check engine warning lamp illuminates. The vehicle was taken to the dealer. The technician diagnosed that the balance shaft was defective and needed to be replaced. Dtb-S-B-03.30/08I was sent to dealers for this known defective part and corrective measures. The manufacturer was made aware of the failure and offered to cover half of the 7K repair. The vehicle was not repaired. The fiirst time lamp lit was at 72,245 miles but went off. Lamp continued to light intermitted but stays on now more than off diagnosis mileage was 73,845. The current mileage is 75,679.

- Cleveland, GA, USA

problem #3

Jul 232012

R350 6-cyl

  • 77,330 miles


Balance shaft, ,,,coad 1200&1208.

- Chicago, IL, USA

problem #2

May 152012

R350 6-cyl

  • 101,733 miles
The car is in to replace the intake manifold and the balance shaft. After checking the internet to determine if this problem has occurred with other owners of this vehicle it had become apparent this exact repair is very common for the 2006 R350. The total expense will be approximately $6,500-7,000 usd. There has been a class action law suite filed in the state of NJ against Mercedes for this known problem.

- Williamsburg, VA, USA

problem #1

Nov 012011

R350 6-cyl

  • 79,000 miles
Check engine light and codes for balance shaft and intake. Dealer quotes $7000 for work.

- Alpine, NJ, USA

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