Mercedes-Benz 300E Repair and Maintenance - Get an online auto repair estimate for your Mercedes-Benz 300E

if i want to start the car it's need 5 times trying, then the RPM coming high one time and coming down 5 another time if you put the gear on D its coming under 5 while you stopped and if turn AC on...

2 answers

coolant leak

raye, 1990 Mercedes-Benz 300E, Johnstown, PA

I have a 1990 mercedes 300E. 150,000 miles. 300ci 6 cyclinder. There is a coolant leak on the drivers side coming down the side of the motor. I cant see exactly where it starts because the intake m...

1 answer

cold start valve

bishokl, 1991 Mercedes-Benz 300E, Denver, CO

The cost to have the cold start valve replaced. Hard to start when cold and idles a little ruff.

1 answer

odometer doesn't engage(clicking noise-no tenth movement)

steelman, 1992 Mercedes-Benz 300E, Auburn, IN

Odometer keeps track of milage, but tenth reset does not work, but makes a click every tenth of a mile. What other than a VDO is wrong with this and is there a fix?

2 answers

Cost for seal replacements

shibalover, 1992 Mercedes-Benz 300E, Williamsburg, VA

How much should I expect to pay for rear axle seal replacement and front crankshaft seal replacement?

1 answer

AC unit

bishokl, 1991 Mercedes-Benz 300E, Denver, CO

My AC is blowing hot air. I just have it serviced and recharge last summer. Everything was working, no leaks and was able to take charge. Now when I go to turn it on it will not blow cool, just hot...

1 answer

Electro-hydraulic Actuator

Filea, 1991 Mercedes-Benz 300E, Tacoma, WA

where is located the Electro-hydraulic Actuator

1 answer

distributor/rotor adapter problem

Igor Ed, 1990 Mercedes-Benz 300E, Forgan, OK

I am attempting to change out the distributor/rotor adapter. It is a keyed shaft. I have removed the screw and was told to give it a quarter turn and it would slide out. The screw is out, but canno...

2 answers

ac not working

bdavid, 1991 Mercedes-Benz 300E, Severna Park, MD

my ac blower motor stop working after i got my new radio hard wired installed. how can i get it to work again? everything else seems to be working fine.

2 answers

swaping 99 explorer4wd for 92 300E 6cyl

brucewms, 1992 Mercedes-Benz 300E, Vincent, AL

My explorer has 200,000 miles but well taken care of. I drive daily. I have an offer to swap for 92 300E. The mercedes in very good condition. Seems to be as well kept as my Explorer. Mercedes has ...

1 answer

Repair Estimate - Suspension & Steering

G-Pa, 1992 Mercedes-Benz 300E, Fresno, CA

Need estimate to repair the lower control arm on the steering & suspension system. Also, a repair estimate to R & I a steering system kit.

3 answers

Cost to replace water pump?

DaveK, 1990 Mercedes-Benz 300E, Westminster, MD

I have a 1989 Mercedes 300 that needs to have the water pump replaced. The repair shop said I should also have the thermostat replaced at the same time. They gave me an estimate of $795. Is that...

1 answer

AC Unit

bishokl, 1991 Mercedes-Benz 300E, Denver, CO

It will not engage when I turn it on. It turns on when it wants. I had it check for leaks when I had it recharged. They use dye when checking for leaks. When it turns on it works great. I have re...

1 answer

ABS brakes

bishokl, 1991 Mercedes-Benz 300E, Denver, CO

My ABS light is coming on. I had my front and rear brakes done about eight months ago and at that time the brake fluid was also replaced. Before the light comes on the brakes on a little mushy, bu...

2 answers

Car doesn't Start

klion66, 1993 Mercedes-Benz 300E, North Port, FL

Hi, my Mercedes-Benz has stopped turning on. The starter spins the motor and the injector pump works but the spark plugs are not giving off a spark. The spark plugs are brand new. What could be the...

3 answers

handling

maki, 1991 Mercedes-Benz 300E, Greenford, OH

The car seems to wander from side to side slightly while driving, especially noticeable at higher speeds. /front end suspension parts seem tight. Where to look?

1 answer

how to put aircondition and where is the device locate

trucho, 1991 Mercedes-Benz 300E, San Bruno, CA

where is the compressor and where do i put the ac

1 answer

rough idle

chuckp, 1992 Mercedes-Benz 300E, Park Ridge, IL

My '92 300e with 134k miles has a persistent rough idle. changed fuel filter, but it didn't help. What could be wrong?

4 answers

why my mercedes will not start when it is cold.

lejune, 1992 Mercedes-Benz 300E, Raleigh, NC

My car will not start when it is cold in the morning. But once it gets started it is fine... What could be the problem??

» Back to top
Mercedes-Benz 300E Car Reviews (5)

1992 Mercedes-Benz 300E, lejune, Raleigh, NC, November 13, 2009 12:25
Having problems with it starting in the morning when it is cold...
1990 Mercedes-Benz 300E, elk812002, Fresno, CA, May 22, 2009 20:19
Everything is great except when taking off at a dead stop, it tends to feel like it's not gonna make it then, wham, she takes off barks 2nd gear and goes. And that is with a striaght 6 cyl
1992 Mercedes-Benz 300E, steelman, Auburn, IN, April 10, 2009 14:10
117000 miles and no leaks, drips, or bad concerns. New brakes ,rotors and tires, but I am uncertain what a 120K mile maintenance should entail and cost. First time user and new Mercedes owner. Vehicle is a 300E 4Matic. Thanks in advance for any guidance.
1990 Mercedes-Benz 300E, Porsche650, Croton On Hudson, NY, March 05, 2009 13:48
I have a 4-matic so a bit diffrent. I love the car even with the problems it has truthfully for a car that once cost $40000+ New and still somewhat have a value and a demand for well can't really complain about it. Only issues i have is the front suspension bushings go bad prematurely especially 4matic, which also bring me to the front brakes causing vibration and squeaking after 50% spent which can be fixed by getting vented disks and good quality pad. The headgasket has been done as well which for anyone that does it no matter what a mechanic tells you you must have the head plained to make sure you have a even match or else the leak will come back. The car for the milage i have 201,000 i cannot complain because for another type of car that had the same i am sure the quality of parts would not hold up to the test of time like a 1990 Mercedes 300E.
1993 Mercedes-Benz 300E, David Sturtz, Berkeley, CA, December 29, 2008 17:12
Great car - family owned it forever. Few problems that were not mileage-appropriate.

» Back to top
Mercedes-Benz 300E 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.
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.
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.
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.
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.
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.
Heating & Air Conditioning	Due to wear of mechanical parts in the control head, the buttons on temperature control assemblies work erratically or not at all. These control heads need to be replaced for this concern or when the display screen starts to fade out. Due to the vacuum actuators going bad, temperature blend doors in the HVAC system may stop working.

	Find the right shop for your 300E The best shops near you - with ratings and reviews Find a Shop (City and State or Zip)
	Get inside info about your 300E Common problems and Q&A Recalls, ratings & reviews
	Track your 300E's service Keep everything online in one place. Get service reminders