Total Complaints
5 filings
MERCEDES-BENZ 300SD · model year
1984 MERCEDES-BENZ 300SD
5 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1984MERCEDES-BENZ300SD carries 5 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1984 300SD is electrical system:wiring:front underhood with 1 filings, followed by engine and engine cooling:engine (1) and vehicle speed control:accelerator pedal (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 15 investigation files overlapping the 1984 300SD. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
5
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD | 1 |
| ENGINE AND ENGINE COOLING:ENGINE | 1 |
| VEHICLE SPEED CONTROL:ACCELERATOR PEDAL | 1 |
| SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP | 1 |
| TIRES | 1 |
Recent Complaints
20100510TIRES
TL* THE CONTACT OWNS A 1984 MERCEDES 300SD. THE VEHICLE WAS EQUIPPED WITH GOODYEAR ASSURANCE COMFORTED 195/70/14 TIRES. UPON EXAMINING THE VEHICLE, THE CONTACT NOTICED THAT THE FRONT PASSENGERS TIRE WAS DEFLATED. THE CONTACT ALSO STATED THAT THE SIDEWALLS ON ALL FOUR TIRES WERE DRY AND ROTTED. THE FAILURE AND CURRENT MILEAGES WERE 228,000.
Mileage: 228,000
20010202VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
WHILE DRIVING ON THE HIGHWAY, THE ACCELERATOR PEDAL STUCK AND THE BRAKES FAILED TO STOP VEHICLE, CAUSING LOSS OF CONTROL OF THE VEHICLE. *AK *YD
20010202SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
WHILE DRIVING ON THE HIGHWAY, THE ACCELERATOR PEDAL STUCK AND THE BRAKES FAILED TO STOP VEHICLE, CAUSING LOSS OF CONTROL OF THE VEHICLE. *AK *YD
19981014ENGINE AND ENGINE COOLING:ENGINE
CAR BLEW CYLINDER HEAD GASKET CAUSING ENGINE OIL TO BURN EXCESSIVELY.
19971010ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
WIRES UNDER THE HOOD IN THE ENGINE COMPARTMENT ARE CRACKED (THE WIRE INSULLATION). THE INSULATION FOR EACH INDIVIDUAL WIRE IS CRACKED (OWNER CAN SEE THE COPPER WIRE) THE DEALER HAS BEEN NOTIFIED. *AK
Compare 1984MERCEDES-BENZ300SD to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 1984 MERCEDES-BENZ 300SD have?▼
The 1984 MERCEDES-BENZ 300SD has 5 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 1984 MERCEDES-BENZ 300SD?▼
The most-complained component for the 1984 MERCEDES-BENZ 300SD is ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD with 1 complaints. Other frequently reported areas include ENGINE AND ENGINE COOLING:ENGINE and VEHICLE SPEED CONTROL:ACCELERATOR PEDAL.
Is the 1984 MERCEDES-BENZ 300SD safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.