Makes / Mercedes-Benz / E 400 4MATIC
Mercedes-Benz Repair • Phoenix, AZ
Mercedes-Benz E 400 4MATIC Repair in Phoenix, AZ
Common problems, safety recalls and expert service for the Mercedes-Benz E 400 4MATIC (2018).
Own a Mercedes-Benz E 400 4MATIC in the Phoenix area? EZ Swap LLC repairs and maintains the Mercedes-Benz E 400 4MATIC for model years 2018. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help E 400 4MATIC owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 3 owner complaints on file for the E 400 4MATIC and 1 safety recall campaign. The most-reported problem areas are power train (2), engine (1).
Most-Reported Mercedes-Benz E 400 4MATIC Problems
These problem areas come up most often in NHTSA owner complaints for the E 400 4MATIC (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Power Train | 2 | 66% | |
| Engine | 1 | 33% |
Power Train
2 of the 3 complaints (66%) mention the powertrain. Powertrain complaints can range from rough shifting to loss of drive. We road test, scan for stored codes and inspect fluids before recommending any repair. See our auto repair page.
Engine
1 of the 3 complaints (33%) mention the engine and cooling system. Engine and cooling complaints are best caught early in Phoenix, where heat pushes cooling systems and engine oil to their limits. We diagnose warning lights and check coolant, hoses and oil condition. See our check engine light diagnostics and oil change & maintenance pages.
Mercedes-Benz E 400 4MATIC Check Engine Codes
NHTSA owner complaints rarely cite specific trouble codes for the E 400 4MATIC, so we do not have a model-specific ranking to show. These are the check engine codes we see most often on vehicles in Phoenix heat, and any of them can show up on a Mercedes-Benz.
| Code | What it means |
|---|---|
| P0420 | Catalyst efficiency below threshold (bank 1) Often a worn catalytic converter, but failing oxygen sensors or exhaust leaks can set it too. Can cause an emissions test failure. |
| P0300 | Random or multiple cylinder misfire Worn spark plugs, failing ignition coils, fuel or vacuum problems. Do not ignore a flashing check engine light. |
| P0171 | System too lean (bank 1) Often a vacuum leak, dirty MAF sensor, weak fuel delivery or a failing oxygen sensor. |
| P0455 | EVAP system large leak Missing or loose gas cap, or a disconnected or cracked vapor hose. |
| P0128 | Coolant temperature below thermostat regulating temperature Usually a thermostat stuck open. Fix it to restore efficiency and cabin heat. |
| P0442 | EVAP system small leak Loose or worn gas cap, cracked hose or purge or vent valve. |
| P0301 | Cylinder 1 misfire Commonly a bad spark plug or ignition coil on that cylinder. |
| P0401 | EGR flow insufficient Clogged EGR passages or a stuck EGR valve. |
Got a check engine light on your E 400 4MATIC? A code is a clue, not a diagnosis, so we scan it and test the system before replacing anything. See our check engine light diagnostics.
Mercedes-Benz E 400 4MATIC Safety Recalls
NHTSA lists 1 recall campaign for the E 400 4MATIC in these model years, most often involving power train. Recalls are repaired by the manufacturer at no charge to you, but each applies only to certain vehicles. Look up your VIN at nhtsa.gov/recalls.
- 2026 recall, Power Train (campaign 26V216000): Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018 E 400 4MATIC Sedan, E 400 4MATIC Wagon, E 400 4MATIC Cabriolet, E 400 4MATIC Coupe, 2018-2020 Maybach S 560 4MATIC, S 560 4MATIC Coupe, S 450 4MATIC, 2019-2020 E 450 4MATIC Sedan, E...
Keeping a Mercedes-Benz E 400 4MATIC Reliable in Phoenix
Arizona heat is the hardest test a Mercedes-Benz will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a E 400 4MATIC that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for E 400 4MATIC owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Mercedes-Benz E 400 4MATIC, a pre-purchase inspection shows what the paperwork does not.
Mercedes-Benz E 400 4MATIC Services at EZ Swap LLC
Get the details on our Phoenix Mercedes-Benz E 400 4MATIC repair service, or choose a service below.
Auto Repair
All makes and models, from domestic trucks to imports.
Details →Check Engine Light Diagnostics
Scan, test and pinpoint the real cause.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Car A/C Repair
Phoenix heat demands cold air.
Details →Pre-Purchase Inspection
Know the car before you buy it.
Details →Mercedes-Benz E 400 4MATIC FAQ
What are the most common problems with the Mercedes-Benz E 400 4MATIC?
Based on NHTSA owner complaints, the most-reported problem areas for the Mercedes-Benz E 400 4MATIC are power train (2), engine (1). Complaint counts reflect reports filed, not the share of vehicles affected.
Which E 400 4MATIC model years have the most complaints?
The E 400 4MATIC model years with the most NHTSA complaints on file are 2018. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What check engine codes are common on the Mercedes-Benz E 400 4MATIC?
NHTSA complaints rarely cite specific codes for the Mercedes-Benz E 400 4MATIC. On Phoenix vehicles in general, we see P0420, P0300 misfires, P0171 lean conditions and EVAP leaks such as P0455 and P0442 most often. Bring yours in and we will scan and test it.
Does the Mercedes-Benz E 400 4MATIC have any safety recalls?
NHTSA lists 1 recall campaign for the Mercedes-Benz E 400 4MATIC across model years 2018. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Mercedes-Benz E 400 4MATIC in Phoenix?
Yes. EZ Swap LLC repairs and maintains Mercedes-Benz vehicles including the E 400 4MATIC, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Mercedes-Benz E 400 4MATIC?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Mercedes-Benz E 400 4MATIC in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Mercedes-Benz Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.