Is the 2014 Mercedes-Benz GL450 reliable?

The 2014 Mercedes-Benz GL450 has 27 complaints filed with NHTSA (0.6x the segment average). Our reliability verdict: above-average. Most common issue: ENGINE problems.

What are common problems with the 2014 Mercedes-Benz GL450?

Top problems: ENGINE (7 complaints, avg repair $500); VISIBILITY (3 complaints, avg repair $500); OTHER (3 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2014 Mercedes-Benz GL450?

No recalls have been issued for the 2014 Mercedes-Benz GL450.

How much does it cost to fuel a 2014 Mercedes-Benz GL450?

The 2014 Mercedes-Benz GL450 gets 16 MPG combined. At current US average gas prices, driving 12,000 miles per year costs roughly $3000. See the interactive fuel cost calculator on this page for state-specific pricing.

How much does it cost to insure a 2014 Mercedes-Benz GL450?

Estimated US average full-coverage insurance for the 2014 Mercedes-Benz GL450 is approximately $2,079/year (suv-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.

2014 Mercedes-Benz GL450

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2014 Mercedes-Benz GL450 has 27 owner complaints filed with NHTSA — that's 0.6x the segment average of 48. The most common issue is engine problems (26% of all complaints), specifically: oil leaking and wicking into camshaft position sensors, camshaft magnets, o2 sensors, engine wiring harness and ultimately, the ecu is destroying all electronic components connected to the engine causing misfiring and seizing. the issue is quite prevalent via internet research as potentially thousan.

Total Complaints

Recalls Issued

—/5

Safety Stars

0.6x

vs Segment Avg

Known Problems(top 5 of 8)

ENGINE

7 complaints

26%

• Oil leaking and wicking into camshaft position sensors, camshaft magnets, O2 sensors, engine wiring harness and ultimately, the ECU is destroying all electronic components connected to the engine causing misfiring and seizing. The issue is quite prevalent via internet research as potentially thousan
• Car got a check engine for failed turbochargers at 71000 miles. Mercedes refused to acknowledge and get the problem addressed.
• It has makes sound noise and timing chain tension is made very poor not safety , also warming blibd spot frozen not working, display electric poor damage byself tomve fix timing dealer wants 15,000$ to be fix more then value of the suv

Typical onset: 50K miles Est. repair: $500

“Oil leaking and wicking into camshaft position sensors, camshaft magnets, O2 sensors, engine wiring harness and ultimately, the ECU is destroying all electronic components connected to the engine causing misfiring and seizing. The issue is quite prevalent via internet research as potentially thousan”

— NHTSA complaint filing

When Problems Appear on the 2014 Mercedes-Benz GL450

Based on 12 owner complaints that included an odometer reading. Median mileage at time of complaint: 57K miles. Most complaints cluster in the 30-60K miles range.

Overall complaint distribution by mileage

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.

Fuel Cost Calculator for 2014 Mercedes-Benz GL450

Live EIA prices

Annual miles driven: 12,000

Your state (affects local gasoline price)

Per year

$3,001

Per month

$250

Per mile

25.0¢

MPG

City driving (worst-case MPG)

$3,429/yr

Highway driving (best-case MPG)

$2,527/yr

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.

5-Year Gas Price History

EIA weekly retail data · 2021 → today

Show:

Current

$4.00

5-year low

$2.78

5-year high

$5.01

Since 2021

+27%

Source: US Energy Information Administration weekly retail gasoline prices.

Estimated Insurance Cost for 2014 Mercedes-Benz GL450

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

$2,079

Full coverage / month

$173

Liability only / year

$732

vs US avg

+24%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (suv-luxury)1.35x

× theft risk1.00x

× safety rating1.00x

× vehicle age0.92x

= Full coverage estimate$2079

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

Maintenance & Warranty

Recommended Mercedes-Benz GL450 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 2014 GL450, 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.

Estimated Repair Costs

ENGINE(~50K mi)

$500

VISIBILITY(~50K mi)

$500

OTHER(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

TRANSMISSION(~50K mi)

$500

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

🔍 Pre-Purchase Inspection Checklist

Based on 27 owner complaints for this specific year, here's what to check or ask about:

☐
ENGINE: Oil leaking and wicking into camshaft position sensors, camshaft magnets, O2 sensors, engine wiring harness and ultimately, the ECU is destroying all electronic components connected to the engine causing misfiring and seizing. The issue is quite prevalent via internet research as potentially thousan
Typically appears around 50K miles. Repair cost ~$500
☐
VISIBILITY: WHILE DRIVING ON THE FREEWAY AT ABOUT 70 MPH THE SUNROOF EXPLODED. WE WERE NOT BEHIND ANOTHER CAR AND DRIVING IN THE MIDDLE OF AN UNPOPULATED AREA ALONG THE !-10 FREEWAY. *TR
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: CONSISTENT MILDEW FOUL ODOR COMES FROM THE AIR CONDITION.
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: TL* THE CONTACT OWNS A 2014 MERCEDES-BENZ GL450. WHILE OPERATING THE VEHICLE, SEVERAL MESSAGES DISPLAYED REGARDING THE PARKING BRAKE RELEASE, TRANSMISSION, AND THE VEHICLE BEING INOPERABLE. ALSO, SEVERAL ELECTRICAL FEATURES MALFUNCTIONED. THE VEHICLE WAS TOWED TO WORLD WIDE MOTORS INC. (3900 EAST 96
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)