2006 Mercedes-Benz R350 Electrical system Problems
- Complaints
- 14about this part
- Share
- 14%of 99 total for the year
- Median mileage
- 82,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the electrical system of the 2006 Mercedes-Benz R350, 14% of the 99 complaints for this model year. Where a mileage was given, the median is 82,000 miles. 4 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Rear light modules (tail, reverse, brake, signal) keeps on failing. Dealer quotes initially $250 to fix/rewire but then goes up to $950 to replace ecu. This is frustrating as this is driving hazard, owners are left without much choice. I have seen multiple complaints of the same issue so mb should already know that this problem exists and be honest upfront about it. I hope nobody gets hurt if the lights fail while driving this model/brand.”
NHTSA complaint #10811954, filed 2015-12, 80,000 miles“On my 2006 mercedes benz R350, the rear brakelights and taillights regularly fail to eliminate. The lights are very inconsistent and when they fail a back-up substitute light comes on. A message appears on the dash indicating that the substitute lights are on. After changing the bulbs numerous times, I was told by a mechanic at mercedes that the contact may be worn out.”
NHTSA complaint #10372335, filed 2010-12, 65,000 miles“Car goes into limp mode cant drive faster than 20mph on freeway very dangerous. Have to pull over turn off engine and restart car to reset. Car just randomly shut off all electronics died on street. Towed car to dealership says needs new valve body of transmission. Researched online very common problem. Defect in manufacturing and parts.”
NHTSA complaint #10949628, filed 2017-02, 128,000 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.”
NHTSA complaint #10811951, filed 2015-12, 88,000 miles“While driving, smelled burning odor but saw no smoke or fire. Driver's side seat heater was on at time odor was noticed. Turned it off immediately and stopped vehicle. Odor went away but noticed upper left of seat back had two burn holes. Made appointment for service.”
NHTSA complaint #10505737, filed 2013-04, 84,000 milesRelated service bulletins
- 11015640Mar 5, 2025Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 11008091Sep 28, 2024Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 10205233Aug 5, 2013Mobile phone cotacts are not transferred completely.
- 10037653Dec 10, 2010Mercedes-benz: there are electrical production quality issues that cause the air bag warning light to illuminate.
- 10033070Dec 16, 2009Xentry (mercedes): engine warning lamp is currently on or was on and a delay fault of the camshaft adjust to current or stored in the engine control unit. Models 171, 203, 209…
- 10032568Aug 1, 2009Mercedes benz service campaign: see document search button for owner letter. Software calibration number (scn) coding; engine control module. The vehicles fuel tank leak…
- 10023372Jan 15, 2008Mercedes-benz models ml63, ml320, ml350, ml500, r320, r350, r500 with code 489 (airmatic suspension) - airmatic inoperative/ (visit workshop) displayed in instrument cluster…
- 10023784Nov 1, 2007Models e320, e500, e55, e350, e550, e63, ml350, ml500, ml63, ml320, ml550, gl450, gl320, gl550 with diesel engine om 642 my 2006-2007 -- update engine control module software.
- 10016656Feb 24, 2006Power closing assist on the tailgate intermittently nonfunctional.
- 10018816Dec 13, 2005Learning in selection range sensor not possible after ehs replacement.
Electrical system: other model years
Other parts of the 2006 Mercedes-Benz R350
26 complaintsEngine
17 complaintsEngine cooling
16 complaintsTransmission and drivetrain
13 complaintsSeats
9 complaintsExterior lighting
7 complaintsSteering
5 complaintsFuel system
4 complaintsOther or unknown
4 complaintsAir bags
3 complaintsBrakes
3 complaintsBody and structure
3 complaints
← All problems reported for the 2006 Mercedes-Benz R350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology