Mercedes-Benz 300SL Repair and Maintenance - Get an online auto repair estimate for your Mercedes-Benz 300SL
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Mercedes-Benz 300SL Repair and Maintenance
Mercedes-Benz 300SL Model Years
Mercedes-Benz 300SL Questions and Answers
turkwurk, 1992 Mercedes-Benz 300SL, North Charleston, SC
where are the spark plugs and wires located on a 1992 300 sl
framar, 1992 Mercedes-Benz 300SL, Milwaukee, WI
i owne a 92 300sl, the car cranks very strong, but it doesn't want to start. i know it can be saveral things, but i would like to start withthe least expensive. also does anybody carry a services m...
turkwurk, 1992 Mercedes-Benz 300SL, North Charleston, SC
I Would like the radio wiring diagram for a 300sl 1992 mercedes so i can hook up a aftermarket radio. I need to know the wiring color diagram because i cant get my hands on a harness for this year
car is 1983 380 sl starts up and kinda idles with a little missing
turkwurk, 1992 Mercedes-Benz 300SL, North Charleston, SC
can any other model mercedes cylinder heads be used on my 1992 mercedes 300sl?
h20space, 1991 Mercedes-Benz 300SL, Palm Harbor, FL
please help me locate bolt pattern and waht has to be removed just to remove water pump
ChrisL, 1990 Mercedes-Benz 300SL, Seattle, WA
The hard top will not release at the windshield. Any ideas
po7553, 1992 Mercedes-Benz 300SL, New Fairfield, CT
Could someone please tell me where the fuel filter for a 1992 300SL Mercedes is located.Please be specific because I know very little about engines, Thanks
jbenz, 1991 Mercedes-Benz 300SL, Churchton, MD
My tranny is leaking.How do I change the transmission filter
I let the battery die and cant get at it cause the battery is in the trunk and it wont unlock cause of power locks
Waves, 1993 Mercedes-Benz 300SL, Westchester, IL
I have a 1993 300SL that has just developed this awful loud noise when I turn the steering wheel in either direction. I checked the power steering fluid and it is full. The noise appears to be comi...
this car is actually a 1984 380SL . It only blows cold air and no warm or hot air at all, even in the heat position. I wonder if the diverter door is stuck.....or..... any help out there? Just pu...
Anonymous, 1990 Mercedes-Benz 300SL, North Hills, CA
Where is the oil filter located
Mercedes-Benz 300SL Car Reviews (2)
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Most reliable, affordable (used car) I have ever owned. And i have had many! Maintenance is cheaper than my mini van, if you go to the right place. I go to Collie Autoworks in San Rafael Ca. Darren and Denise are the ABSOLUTE BEST. I LOVE this CAR !!!
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Great Car! Maintenance not cheap, but not bad for such an expensive car. fun fun fun
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Mercedes-Benz 300SL Problems
| Brakes |
- Due to the size and materials of the brakes on these vehicles, the brakes start to squeak around the 50 percent wear point. The brake rotor surfaces become uneven, causing a lip to form at the outer edge of the rotor. Because of this, the rotors are usually replaced when the pads are worn (pad life varies depending on driving style and terrain).
- Brake fluid should be flushed every two years to prevent premature anti-lock brake system (ABS) failure.
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| Engine |
- Oil leaks develop from the head gasket and timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix.
- The part that attaches the distributor rotor to the camshaft can break; the starter will still crank, but the engine will not start.
- Radiators break due to degradation of the plastic tanks and fittings.
- Older vehicles should have the cooling system serviced even if the mileage is low. The hoses can look good on the outside, but the rubber can degrade and erode on the inside. If not carefully checked, the hoses can burst at any time.
- The water pump can develop leaks. When replacing the water pump, the drive belt tensioner should be inspected and most likely replaced as well.
- Motor mounts fail, causing engine vibrations to transfer to the body. The motor mounts should be replaced or the transmission mount may fail.
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| Exhaust & Emissions |
- A rough running motor or lack of power can be caused by the distributor cap and rotor, bad ignition wires (or their resistors), or valve cover gasket leaks. When the valve cover gasket leaks, oil can pool where the ignition wire resistor connects to the spark plug. The resistor can fail or the spark plug not fire because of the short circuit through the oil.
- Fuel leaks, erratic or rough engine operation, and fuel economy issues can be caused by the failure of a fuel system component called the EHA (electro-hydraulic actuator) valve.
- Emissions air injection pumps can seize up, causing a loud squealing noise possibly followed by smoke. The air pump pulley stops turning, but the drive belt does not and this friction causes the noise and smoke. If the engine is not turned off, the belt will snap, turning on the alternator/battery warning light.
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| Suspension & Steering |
- Irregular and premature tire wear can be caused by the lower control arm bushings cracking and causing excessive movement at the control arm pivot point. Ball joints can also wear out prematurely, causing similar tire wear symptoms.
- The tie rod ends, drag link, and idler arm in the linkage of the steering system can wear out.
- There is a steering dampening shock that will leak fluid when it goes bad.
- A knocking noise from the front end can be caused by cracked strut tower bushings.
- Vehicles with level control that ride harshly in the rear (no give in the suspension, like you are riding on a brick) may have bad dampening actuators. The actuators should be replaced in pairs.
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| Drive Train |
- A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.
- High mileage vehicles can leak from the transmission oil seals.
- High mileage or older vehicles develop leaks at the differential seals and cover; the whole unit needs to be resealed to repair the leaks.
- The bushings for the shifter lever wear out to the point where they break and fall out. This causes excessive movement (loose feel) in the shifter lever and a clanging-type noise when changing gears.
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| Electrical & Lights |
- The insulation degrades on the engine wiring harnesses because the insulating material falls off of the wires and leaves the conductors exposed. This can cause many problems depending on which wires are exposed and what they touch.
- Throttle valves can suffer electrical failure.
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| Heating & Air Conditioning |
- Other than a defective motor, a bad switch or blower motor resistor assembly can cause inoperative heater blower motors.
- Leaks at the AC compressor, hose manifold for the compressor, or the evaporator core can cause poor AC performance.
- The climate control system can fail or perform erratically due to internal wear in the climate control unit buttons.
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