Mercedes 814 Reliability, MOT Pass Rate & Common Faults
Free Mercedes 814 car check
Is the Mercedes 814 reliable? We analysed 2,035 real MOT tests across 258 vehicles to find out.
Got a specific Mercedes 814? Enter the reg for a free check:
The Mercedes 814 is above average for reliability based on real UK MOT data. Common problems include statutory seat belt missing, windscreen wiper does not clear the windscreen effectively and service brake: efficiency below requirements. Here's everything you need to know before buying a used Mercedes 814.
Mercedes 814 Number Plates
Number plates registered to a Mercedes 814. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Mercedes 814 MOT Pass Rate by Year
How likely is a Mercedes 814 to pass its MOT? Here's the pass rate for each registration year, newest first.
Mercedes 814 Problems — What Goes Wrong?
The most common reasons a Mercedes 814 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Mercedes 814 Mileage — What's Normal?
How many miles does a typical Mercedes 814 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Mercedes 814 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Mercedes 814 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2003 | 129 | 86.8% | 98,776 | 162,417 | 263,419 |
| 2002 | 79 | 88.6% | 55,286 | 93,790 | 190,450 |
| 2001 | 87 | 80.5% | 62,366 | 92,979 | 109,601 |
| 1999 | 96 | 81.3% | 63,600 | 106,056 | 207,626 |
| 1998 | 70 | 75.7% | 141,428 | 179,079 | 229,422 |
| 1997 | 73 | 75.3% | 98,597 | 179,408 | 257,758 |
| 1995 | 78 | 73.1% | 214,063 | 421,266 | 456,712 |
| 1994 | 117 | 73.5% | 137,151 | 180,104 | 314,143 |
| 1993 | 66 | 78.8% | 133,549 | 354,957 | 719,983 |
| 1991 | 71 | 76.1% | 81,263 | 256,959 | 380,124 |
| 1990 | 53 | 75.5% | 107,099 | 247,956 | 482,539 |
| 1989 | 111 | 85.6% | 230,545 | 382,944 | 579,732 |
| 1988 | 74 | 73.0% | 198,065 | 333,288 | 429,344 |
| 1987 | 76 | 64.5% | 91,620 | 209,645 | 237,342 |
How Long Does a Mercedes 814 Last?
Based on 258 Mercedes 814 vehicles on UK roads.
Mercedes 814 Mileage Distribution
Total mileage recorded across all Mercedes 814 MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Mercedes 814
Based on MOT pass rates across all registration years with sufficient test data.
88.6% MOT pass rate from 79 tests
64.5% MOT pass rate from 76 tests
The best year to buy a used Mercedes 814 is 2002, which has the highest MOT pass rate at 88.6% across 79 tests. The 1987 model year has the lowest pass rate at 64.5% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Mercedes 814 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Mercedes 814 THIS CAR | 76.5% | 2,035 | 216,010 mi | 39 yrs |
| Mercedes Motorhome | 76.7% | 14,848 | 66,873 mi | 45 yrs |
| Mercedes Unknown | 79.2% | 11,881 | 102,484 mi | 39 yrs |
| Mercedes Camper | 74.6% | 8,342 | 82,260 mi | 47 yrs |
| Mercedes-benz E 220 AMG Lne Night ED Prm D A | 85.9% | 2,953 | 42,632 mi | — yrs |
Compared to the Mercedes Motorhome (76.7% pass rate) and the Mercedes Unknown (79.2% pass rate), the Mercedes 814 trails behind on MOT reliability.
Found a Mercedes 814 you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Mercedes 814Should you buy a used Mercedes 814?
The Mercedes 814 has an overall MOT pass rate of 76.5% across 2,035 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Mercedes 814 are statutory seat belt missing (32 recorded failures), windscreen wiper does not clear the windscreen effectively (21), and service brake: efficiency below requirements (20). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Mercedes 814 owner drives around 6,960 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Mercedes 814 models stay on UK roads for around 39 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.