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Mercedes: Reliability & Common Problems

#23 of 24
Longevity rank#1 Tesla holds up to ~184k
~92k
Trouble-free mileageacross all body styles
276
Mercedes vehicles inspectedreal pre-purchase inspections
62/100
Average conditionall cars we check: 61/100



Based on 276 used Mercedes vehicles we inspected, they are in about average shape — average condition 62/100 vs 61 for all cars we check. Every number on this page comes from real pre-purchase inspections — cars people were about to buy and paid an independent inspector to go through point by point, engine to underbody, paint depth to error codes. Not owner surveys, not warranty statistics, not forum lore: what we actually found.

What we found

Most common faults

Oil leaks · Engine
64%
Active error codes · Electronic equipment
50%
Tires condition & wear · Brakes and tires
39%
Fuel trim out of range · Engine
36%
Electronic components issues · Engine
19%

Share of inspected Mercedes vehicles where each item was flagged.

How they score

Excellent 26% Good 29% Mediocre 24% Poor 20%
Hidden history

What the seller might not mention — how often we find it on Mercedes vehicles.

77%had a repainted or replaced panelall cars: 74%
1%showed structural repairall cars: 4%
20%had fault codes recently clearedall cars: 24%

Compare with another brand:

Cross-shopping? Mercedes vs BMW · Mercedes vs Lexus · Mercedes vs Audi

How long does a Mercedes last?

Across every Mercedes body style we've inspected — sedans, SUVs and anything else pooled together — the average one's condition dips below decent (a 55/100 score) around ~92k miles. It ranks Mercedes #23 of 24 brands we have enough data to rate; the longest-lasting, Tesla, holds up to ~184k. Shopping a Mercedes near that mileage? Expect more wear ahead — see which makes give the best odds at your budget.



Good cars by mileage
0 25 50 75 100 0–20k mi: 90% in good shape (29 cars) 20–40k mi: 78% in good shape (50 cars) 40–60k mi: 71% in good shape (49 cars) 60–80k mi: 53% in good shape (43 cars) 80–100k mi: 46% in good shape (37 cars) 100–120k mi: 13% in good shape (23 cars) 120–140k mi: 12%, drawn from the nearby bands (17 cars in this band) 140–160k mi: 9%, drawn from the nearby bands (8 cars in this band) 160–180k mi: 7%, drawn from the nearby bands (6 cars in this band) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
0 25 50 75 100 1 years old: 94%, drawn from the nearby bands (12 cars this age) 2 years old: 92%, drawn from the nearby bands (17 cars this age) 3 years old: 88% in good shape (25 cars) 4 years old: 80% in good shape (25 cars) 5 years old: 67% in good shape (27 cars) 6 years old: 61% in good shape (23 cars) 7 years old: 59% in good shape (22 cars) 8 years old: 51%, drawn from the nearby bands (19 cars this age) 9 years old: 39% in good shape (18 cars) 10 years old: 40%, drawn from the nearby bands (11 cars this age) 11 years old: 31%, drawn from the nearby bands (11 cars this age) 12 years old: 25%, drawn from the nearby bands (14 cars this age) 13 years old: 18%, drawn from the nearby bands (12 cars this age) 14 years old: 18%, drawn from the nearby bands (10 cars this age) 16 years old: 30%, drawn from the nearby bands (5 cars this age) 2y 4y 6y 8y 10y 12y 14y 16y vehicle age when we inspected it

Share of Mercedes vehicles in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; a band under 20 cars follows the nearby bands, so a run above the all-cars line stays above it, and a band of 20 or more uses the rate we measured; where a band has too few cars, the line follows the trend between the bands on either side; rolled-back odometers excluded from the mileage curve). The dashed grey curve is all cars we check.

Is Mercedes getting better?
▲ Newer Mercedes vehicles are holding up better 40% 60% 80% 2012–14: 43% in good shape (age-adjusted; 32 cars, raw 44%) 43 2015–17: 57% in good shape (age-adjusted; 43 cars, raw 58%) 57 2018–20: 61% in good shape (age-adjusted; 34 cars, raw 68%) 61 2009–11 2012–14 2015–17 2018–20 2021+

Share of Mercedes vehicles in good shape (60+/100) when inspected at the same age — 5–10 years old, age-adjusted — by model-year generation; the dashed line is the all-brand average. Compare every brand's trajectory →



Mercedes models we've inspected
S-Class 28 cars · 68% good E-Class 32 cars · 56% good C-Class 35 cars · 40% good GLC 22 cars · profile soon Sprinter 18 cars · profile soon GLE 18 cars · profile soon ML 13 cars · profile soon GLS 13 cars · profile soon SLK 12 cars · profile soon GLK 11 cars · profile soon SL 10 cars · profile soon

Recently inspected:

2024 Mercedes GLS 450 · 20k mi — flagged: tires condition & wear. Inspected Nov 6.
2017 Mercedes GLE350 · 56k mi — flagged: oil leaks, fault codes recently cleared, smoothness. Inspected Nov 4.
The bottom line

Mercedes falls out of decent shape earlier than almost every other brand ranked, typically around 92,000 miles. Oil leaks are the signature problem, with fuel-trim faults and active error codes close behind, so start under the hood and with a scan rather than the badge or the cabin. Repaint is the norm, so fresh panels alone are not a reason to walk; structural repair is uncommon enough that it should kill the deal. Age-adjusted, 2018–20 cars stay in good shape more often than 2012–14. Past that mileage drop-off, unpaid leaks or live codes are your cue to leave.

FAQ
?
Is Mercedes reliable?
55% of the 276 Mercedes vehicles we inspected scored 60/100 or higher, averaging 62/100 — they are in about average shape.
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What are the most common problems with a used Mercedes?
Across the Mercedes vehicles we inspected, the items we flag most often are oil leaks (64%), active error codes (50%), tires condition & wear (39%).
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Are newer Mercedes vehicles more reliable than older ones?
Yes — comparing generations at the same age (5–10 years old), newer Mercedes vehicles hold up clearly better than the early-2010s ones.
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Based on 276 inspections · updated Nov 7, 2026