Is the 2012 Mercedes-Benz ML350 reliable?

The 2012 Mercedes-Benz ML350 has 92 complaints filed with NHTSA (0.9x the segment average). Our reliability verdict: average. Most common issue: ENGINE problems.

What are common problems with the 2012 Mercedes-Benz ML350?

Top problems: ENGINE (23 complaints, avg repair $500); FUEL SYSTEM (17 complaints, avg repair $500); ELECTRICAL (11 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2012 Mercedes-Benz ML350?

No recalls have been issued for the 2012 Mercedes-Benz ML350.

How much does it cost to charge a 2012 Mercedes-Benz ML350?

The 2012 Mercedes-Benz ML350 has an EPA rating of 20 MPGe. At the current US average residential electricity rate, driving 12,000 miles per year costs roughly $3842. State rates vary significantly — see the interactive calculator on this page.

How much does it cost to insure a 2012 Mercedes-Benz ML350?

Estimated US average full-coverage insurance for the 2012 Mercedes-Benz ML350 is approximately $2,495/year (ev-luxury class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

Does the 2012 Mercedes-Benz ML350 qualify for tax credits?

The federal EV tax credit (Section 30D) expired for vehicles acquired after September 30, 2025. If purchased before that date, the 2012 Mercedes-Benz ML350 may still qualify on the 2025 tax return. State-level incentives remain active in 13+ states — see the incentives section on this page for details.

2012 Mercedes-Benz ML350

Problems, Recalls & Reliability Report

Average

Quick Summary

The 2012 Mercedes-Benz ML350 has 92 owner complaints filed with NHTSA — that's 0.9x the segment average of 107. The most common issue is engine problems (25% of all complaints), specifically: tl* the contact owns a 2012 mercedes benz ml 350. the contact stated that the vehicle would not start until after several attempts. while driving, the vehicle began to lose power. the vehicle was taken to the dealer for diagnosis, who stated that they needed to replace the pistons in the engine. the.

6 crash reports 4 injuries

Total Complaints

Recalls Issued

—/5

Safety Stars

0.9x

vs Segment Avg

Known Problems(top 5 of 8)

ENGINE

23 complaints

25%

• TL* THE CONTACT OWNS A 2012 MERCEDES BENZ ML 350. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START UNTIL AFTER SEVERAL ATTEMPTS. WHILE DRIVING, THE VEHICLE BEGAN TO LOSE POWER. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS, WHO STATED THAT THEY NEEDED TO REPLACE THE PISTONS IN THE ENGINE. THE
• VEHICLE LOSES POWER AFTER A FEW HOURS OF DRIVING. THIS PROBLEM DOES NOT SHOW ANY ERROR MESSAGE ON THE DASHBOARD, AND THE DEALER CANNOT FIX THIS PROBLEM AFTER MULTIPLE ATTEMPTS. LAST TRIP TO THE DEALER WHICH WAS 2 WEEKS AGO, THEY INSISTED THAT NOTHING WAS WRONG. HERE ARE EXAMPLES OF HOW SERIOUS THE
• THIS HAPPENED AS A NEW CAR, ONLY NOW, AFTER IT HAPPENED ABOUT 5 OR 6 TIMES, WE CAME TO KNOW THIS WEIRED AND DANGEROUS PROBLEM-IT LOSES THE POWER AT A STOP; AT RED LIGHT, AND EVEN WHEN WE TRIED TO START TO MOVE. WHEN IT HAPPENED, AT FIRST SEVERAL TIMES, WE WERE THINKING MAYBE I DID SOMETHING, AFTER 5

Typical onset: 50K miles Est. repair: $500💥 1 crashes

“TL* THE CONTACT OWNS A 2012 MERCEDES BENZ ML 350. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START UNTIL AFTER SEVERAL ATTEMPTS. WHILE DRIVING, THE VEHICLE BEGAN TO LOSE POWER. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS, WHO STATED THAT THEY NEEDED TO REPLACE THE PISTONS IN THE ENGINE. THE”

— NHTSA complaint filing

When Problems Appear on the 2012 Mercedes-Benz ML350

Based on 60 owner complaints that included an odometer reading. Median mileage at time of complaint: 49K miles. Most complaints cluster in the 0-30K miles range.

Overall complaint distribution by mileage

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

ENGINE

In line with typicalmedian 43K mi · 17 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

FUEL SYSTEM

Later than typicalmedian 59K mi · 11 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

ELECTRICAL

Later than typicalmedian 63K mi · 6 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

TRANSMISSION

High-mileage issuemedian 81K mi · 5 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

Mileage figures are self-reported by owners in NHTSA complaint filings. Peak bucket = the mileage range with the most complaints for that component; it reflects when owners noticed and reported problems, not necessarily when the fault first occurred.

Charging Cost Calculator for 2012 Mercedes-Benz ML350

Live EIA prices

Annual miles driven: 12,000

Your state (affects local electricity price)

Per year

$3,807

Per month

$317

Per mile

31.7¢

kWh/mi

1.69

Based on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.

Estimated Insurance Cost for 2012 Mercedes-Benz ML350

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$2,495

Full coverage / month

$208

Liability only / year

$816

vs US avg

+49%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (ev-luxury)1.62x

× theft risk1.00x

× safety rating1.00x

× vehicle age0.92x

= Full coverage estimate$2495

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Recommended Mercedes-Benz ML350 Service Intervals

Oil change

10K mi / 12 mo

Tire rotation

10K mi

Brake fluid

24 months

Transmission fluid

40K mi

Engine coolant

150K mi

Spark plugs

60K mi

Cabin air filter

20K mi

Engine air filter

40K mi

Differential (AWD/4WD)

40K mi

Service A / Service B alternating schedule. Requires MB-approved oil (229.5 spec typically).

"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.

Mercedes-Benz New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

4 yr / 50K mi

Powertrain

4 yr / 50K mi

Hybrid/EV battery

10 yr / 155K mi

Corrosion (rust perforation)

4 yr / 50K mi

Roadside assistance

4 yr / unlimited mi

EQ EV battery warranty is 10 years/155,000 miles

These are the terms for a new Mercedes-Benz. If you're buying a used 2012 ML350, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Mercedes-Benz dealer for VIN-specific remaining warranty.

EV Incentives for 2012 Mercedes-Benz ML350

Updated 2026-07

Federal Tax Credit (Section 30D) — Expired 2025-09-30

Section 30D new clean vehicle credit ($7,500 max) expired for vehicles acquired after Sept 30, 2025 per Public Law (One Big Beautiful Bill Act). Vehicles acquired on or before that date remain eligible on the buyer's 2025 return. No federal purchase credit exists for post-9/30/2025 acquisitions.

State-Level Incentives (Still Active in 14 States)

CaliforniaUp to $12,000

Clean Cars 4 All

ColoradoUp to $5,000

Innovative Motor Vehicle Credit

ConnecticutUp to $4,250

CHEAPR (Connecticut Hydrogen and Electric Automobile Purchase Rebate)

DelawareUp to $2,500

Clean Vehicle Rebate

IllinoisUp to $4,000

Illinois EV Rebate Program

MarylandUp to $3,000

Excise Tax Credit for Plug-in Electric Vehicles

MassachusettsUp to $3,500

MOR-EV

New JerseyUp to $4,000

Charge Up New Jersey

New YorkUp to $2,000

Drive Clean Rebate

OregonUp to $7,500

Oregon Clean Vehicle Rebate

PennsylvaniaUp to $3,000

Alternative Fuel Vehicle (AFV) Rebate Program

Rhode IslandUp to $2,500

DRIVEEV

TexasUp to $2,500

Light-Duty Motor Vehicle Purchase or Lease Incentive

VermontUp to $5,000

Incentive Program for New Electric Vehicles

See full state-by-state EV incentive details

Source: US Department of Energy Alternative Fuels Data Center + state DOR / DEQ program pages. Program details and eligibility limits change frequently — always verify with the linked source before purchase.

Estimated Repair Costs

ENGINE(~50K mi)

$500

FUEL SYSTEM(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

LIGHTING(~50K mi)

$500

STEERING(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 92 owner complaints for this specific year, here's what to check or ask about:

☐
ENGINE: TL* THE CONTACT OWNS A 2012 MERCEDES BENZ ML 350. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START UNTIL AFTER SEVERAL ATTEMPTS. WHILE DRIVING, THE VEHICLE BEGAN TO LOSE POWER. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS, WHO STATED THAT THEY NEEDED TO REPLACE THE PISTONS IN THE ENGINE. THE
Typically appears around 50K miles. Repair cost ~$500
☐
FUEL SYSTEM: MY WIFE WAS DRIVING MY ML350 ON THE FREEWAY WITH MY 7 YEAR OLD SON IN THE BACK. SHE SAID THE VEHICLE STARTED TO SHAKE IN AN UNUSUAL WAY SO SHE DECIDED TO GET OFF AT THE NEAREST EXIT AND WHEN SHE APPLIED THE BRAKES ON THE OFF RAMP THE CAR'S ENGINE STOPPED. ENGINE LIGHT CAME ON, DASH READ INOPERABLE
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: WHEN THE CAR HAS BEEN RUNNING FOR A WHILE THE DIRECTIONAL SIGNALS STOP WORKING
Typically appears around 50K miles. Repair cost ~$500
☐
LIGHTING: TL* THE CONTACT OWNS A 2012 MERCEDES-BENZ ML350. THE CONTACT STATED THAT HEAD LIGHT WOULD NOT ILLUMINATE BEYOND TWENTY FIVE FEET, MAKING NIGHT TIME DRIVING VERY DIFFICULT. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THE DEALER COULD NOT DETERMINE THAT THERE WAS A DEFECT. THE CONTACT STATED THAT H
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)