The Mercedes-Benz 123 series is an icon of reliability and engineering, hugely popular in New Zealand. From 1976 to 1980, these cars were known for their robust construction and longevity. However, age takes its toll, making diligent inspection and maintenance crucial for NZ owners.
Common issues include rust (especially around wheel arches, sills, and floors), worn suspension components (subframe mounts, control arm bushes), diesel injector and pump problems (diesel models), and electrical faults due to brittle wiring and corroded connections. Vacuum system leaks (affecting central locking and climate control) are also frequent.
WOF tips
Rust is a key WOF failure point, particularly around structural areas. Suspension components (shocks, springs, bushes) must be in good condition. Check brake lines and hoses for corrosion and leaks. Headlights and taillights should be fully functional. Steering systems need to be free from excessive play. Functionality of seatbelts are mandatory.
About the Mercedes-Benz 123 300 D
The W123 series was renowned for its durable engines, both petrol and diesel. However, diesel models, while long-lasting, can suffer from injector issues and pump wear with age. Suspension components, particularly the rear subframe mounts, are prone to deterioration. Rust is a major concern, especially in coastal regions. Electrical systems, while robust for their time, can develop faults due to age and corroded connections.
Questions owners ask
What are the common rust spots I should check on a Mercedes-Benz 123 for a WOF in New Zealand?
For WOF purposes, pay close attention to rust around the wheel arches, sills, and floor panels of your Mercedes-Benz 123. Structural rust in these areas is a common cause for WOF failure. Also inspect brake lines for corrosion.
Where can I get brake pads and other parts for my Mercedes-Benz 123 1976–1980 in NZ?
CARFIX stocks 277 SKUs for the Mercedes-Benz 123 1976–1980. You can find brake pads, filters, suspension components, and more on the CARFIX website or in-store.
My Mercedes 123 diesel is running rough. What could be the problem?
Rough running in a Mercedes-Benz 123 diesel is often due to issues with the fuel injectors or the fuel injection pump. These components can wear out over time, especially in older vehicles. Consider having a diesel specialist inspect and service the fuel system.
What are the common suspension issues with the Mercedes-Benz 123 in New Zealand?
The rear subframe mounts and control arm bushes are prone to wear and deterioration in the Mercedes-Benz 123. This is accelerated by New Zealand's road conditions. Listen for clunking noises and check for excessive play in the suspension components. These are also WOF failure points.
What kind of maintenance schedule should I follow for my Mercedes-Benz 123?
A good starting point is to follow the factory recommended service interval of 10000km for oil changes and general inspections. However, given the age of these vehicles, more frequent checks of fluids, hoses, and belts are advisable. Pay special attention to rust prevention.
My central locking and climate control are acting up on my Mercedes 123. What's likely the cause?
Vacuum system leaks are a common problem in the Mercedes-Benz 123, affecting the central locking and climate control systems. Check the vacuum lines for cracks and leaks, especially around connections. Replacing brittle or damaged lines can often resolve these issues.
What should I be aware of regarding the electrical system on my classic Mercedes-Benz 123?
The electrical systems in the Mercedes-Benz 123, while relatively robust for their time, are prone to faults due to age and corroded connections. Check wiring for brittleness and ensure all connections are clean and tight. Headlights and taillights must be fully functional for WOF.