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450SL

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Question
Heater only blowing cold air.
There are two likely causes for your concern. Either your heater core inside your dashboard is clogged, or one of the doors that directs the air to your heater core is malfunctioning. I would enlist the help of a certified...
Question
Fuel line issues.
It is possible you have a bad fuel pump or a clogged fuel filter. I would recommend getting a technician such as one from YourMechanic to come out and check fuel pressure and replace the fuel filter.
Question
Gas tank access door not opening
A visual inspection of the problem will help us determine the cause of your issue. You likely have a damaged cable which runs to the door, or even perhaps a broken piece of plastic in the system. A qualified technician,...
Question
Gas pedal hard to apply, can't go past 55 mph
Hello. It sounds like the transmission isn’t shifting gears properly. A problem with the first, second, and/or third gear can cause difficulty with acceleration. Another possibility is that the catalytic converters are clogged causing poor acceleration. When this happens it...
Question
Tachometer malfunction
Hello. There are a few reasons why this is happening. The tachometer on the instrument cluster may be bad, and the instrument cluster may need to be replaced. There also could be a problem with the speedometer shaft and its...
Question
Smoke from the dashboard, parking lights won't turn off
Hello. It sounds like there is a short in the wiring harness of the car. If the wiring comes into contact with other wiring, this may cause a short and smoke from the dashboard. This sometimes happens due to old...
Question
Engine steam and antifreeze leak - 1976 Mercedes Benz 450SL
Hello. This sounds like the water pump, radiator, radiator hoses, or even one of the heater hoses, have started to leak. It is also possible that the gasket to the thermostat could have a leak as well. It doesn’t sound...
Question
Car won't start, battery drain - 1979 Mercedes-Benz 450SL
Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator. This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended that...
Question
Power steering goes out
On the GL450's three are 4 common issues that can cause this. Mercedes Benz has a recall for the failure of a driving pin that controls power steering pressure. Your local dealer will need to be contacted to see if...
Question
The transmission slips gears and the car has no kick down
If the transmission is slipping, then the vehicle will seem to not accelerate, or the vehicle will not move very fast. It seems that there could be an issue with the transmission that is causing the slippage. Check the kick-down...

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