1977 Mercedes-benz 450slc problems

Common 1977 Mercedes-benz 450slc problems

The Mercedes-Benz 450SLC, produced in 1977, is known for its robustness and reliability, especially the M117 engine and transmission. However, like any car, it is prone to certain issues due to age, mileage, and specific components. Here are some common problems with the 1977 Mercedes-Benz 450SLC based on complaints from owners:

• Rust: Rust can be a problem in the Mercedes-Benz 450SLC, particularly around the rear and side windows, guards, doors, and under the carpet in the front passenger side.

• Interior Trim and Seats: The interior trim, including the seats, can split or collapse due to age and usage.

• Dash Cracks: The dash pad can develop cracks due to sun exposure, which can be expensive to repair and affect the car's appearance.

• Front Suspension: The lower control arm rear mounting points in the front suspension are known to crack, which can cause a cracking noise under braking. This issue can lead to expensive repairs if not addressed promptly.

• Engine and Transmission: The M117 engine is generally reliable, but it may require checking for timing chain stretch with higher mileage. The transmission, while robust, can still experience issues due to age and usage.

• Rubber Components: Older cars, including the 1977 Mercedes-Benz 450SLC, are prone to issues with rubber components, gaskets, seals, and vacuum lines due to age and cracking.

• Fuel Distributors and Steering Gearboxes: These components can be pricey to replace, and the car may require more frequent repairs as it ages.

• Idling and Missing: Some owners have reported rough idling and missing, which can be caused by various issues, including fuel injectors, spark plugs, and fuel filters. These problems can lead to shaking at stoplights or in traffic jams.

• Airbags and Security Issues: For those considering the 450SLC as a daily driver, it is important to note that older cars without airbags may have higher insurance premiums and increased bodily damage risk in collisions. Additionally, newer vehicles may have more gizmos, which can lead to more expensive fixes.

In conclusion, while the 1977 Mercedes-Benz 450SLC is known for its robustness and reliability, it is still prone to certain issues due to age, mileage, and specific components. Potential buyers should be aware of these common problems and consider them when making a purchasing decision.

Is a 450 SL Mercedes a good car?

2018 SL450 a Great GT Convertible

Great performance, balance, appointments and safety wrapped into a fun and beautiful coupe/hardtop/convertible. Pricey, but top end of the Mercedes line is, as this well equipped SL costs over $100K.

How many miles per gallon does a 1977 Mercedes 450sl get?

Based on data from 1 vehicles, 102 fuel-ups and 21,229 miles of driving, the 1977 Mercedes-Benz 450SLC gets a combined Avg MPG of 12.20 with a 0.62 MPG margin of error. Below you can see a distribution of the fuel-ups with 0 outliers (0.00%) removed.

What is the problem with the 1976 Mercedes 450sl?

The catalytic converter was under the hood, and a lack of ventilation caused overheating (Mercedes addressed this for the 1976 model). Also, 450SLs may have issues with the valves, controls, and other equipment in their climate-control system.

How much horsepower does a 1977 Mercedes 450sl have?

The 4.5-liter M117 V8 features Bosch K-Jetronic fuel injection and was factory rated at 180 horsepower and 220 lb-ft of torque. Power is sent to the rear wheels through a three-speed automatic transmission.

Is a 450 SL Mercedes a good car?

2018 SL450 a Great GT Convertible

Great performance, balance, appointments and safety wrapped into a fun and beautiful coupe/hardtop/convertible. Pricey, but top end of the Mercedes line is, as this well equipped SL costs over $100K.

What is the problem with the 1976 Mercedes 450sl?

The catalytic converter was under the hood, and a lack of ventilation caused overheating (Mercedes addressed this for the 1976 model). Also, 450SLs may have issues with the valves, controls, and other equipment in their climate-control system.

How much horsepower does a 1977 Mercedes 450sl have?

The 4.5-liter M117 V8 features Bosch K-Jetronic fuel injection and was factory rated at 180 horsepower and 220 lb-ft of torque. Power is sent to the rear wheels through a three-speed automatic transmission.

Where is the fuel pump relay on a 1976 Mercedes 450sl?

It is located either behind the glove box or above the fuse box in the relay panel. You will need to remove the inner glove box liner to access the relay if it isn't above the fuse box. You can jump terminal #30 and #87 in the connector with a fused jumper and your pump should run.

1977 Mercedes-benz 450slc car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Mercedes-benz 450slc problems, we found that the most common problems with these 2023 model year vehicles are:

• Structure problems

The graph below shows statistics for all 1977 Mercedes-benz 450slc vehicle components and the number of complaints received.