Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [mercedes-benz]

Descended from the first motor car manufacturer, now a luxury German carmaker and part of the Daimler group.

268 questions
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2 answers

how to optimize fuel consumption by changing the rear differential ratio?

Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph). Is it true that the rear differential ratio is optimized for a…
ria
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14
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6 answers

Second hand car - Engine/Tyres/Etc

I am looking into buying a second hand car from a reputable Mercedes-Benz dealer (not just some dodgy salesman by the side of a road lol....). Anyway, there are a few maintenance/mechanical things which I want to check, but I don't quite understand…
Dan
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11
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2 answers

how can I measure the amount of fuel injected into a diesel engine in real time in a purely mechanic pre-OBD vehicle?

This is a Mercedes-Benz 308D van, year 1992, model 602.316. Pre-OBD, no electronics of any sort, everything is purely mechanical. I would like to retrofit a system which would measure the precise amount of fuel injected into the engine in real…
ria
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10
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7 answers

What could be some reasons my old diesel Mercedes won't start?

The vehicle is a Mercedes-Benz T1 model 308D. The engine is an old Mercedes-Benz OM601.940 4-cylinder indirect injection 58 kW (79 hp) 2299 dm3 diesel engine from year 1992. It's not a turbodiesel! - it's a classic plain naturally-aspirated diesel…
ria
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10
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1 answer

I lost my Mercedes smart key, how do I get a new one?

If I lose a Mercedes smart key fob, how do I get a replacement? Is there anything I should do to prevent the old key from being used if it was stolen?
Zelda
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10
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3 answers

1983 Mercedes Diesel - Loses Power Over Time

I picked up this car as a gift, and on day one drove it the 370+ miles home. After the first 160 miles or so I noticed that the car was struggling to maintain highway speeds. So I pulled over into a rest stop, and took a short break. When I hit the…
Joe
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9
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3 answers

With the weather is getting cold, I have problems starting my 2001 C240 Mercedes

I have a 2001 Mercedes C240. Since the weather has been getting cold lately, I have had a problem starting the car. When I try to start the car, it makes no sound. After several attempts, the engine will start. A local mechanic says that the…
azizi
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8
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3 answers

Can I reprogram a used Mercedes smart key?

I want a new key for my Mercedes Benz and I've heard that you can get a used smart key for much cheaper than a new one from a licensed Mercedes mechanic. Can I reuse an already programmed Mercedes smart key fob? I've heard a Mercedes can be…
Zelda
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8
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3 answers

Repairing broken power steering pump mounts

I replaced the power steering pump in my Mercedes and after Two days the mounts which are attached to what looks like the engine broke off. Not the mounts on the pump. What is the best way to fix the broken mounts? Thank you so much in advance…
Ryan F
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8
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2 answers

Vibration when Stopped in Gear with Foot on Brake

1998 Mercedes E320 (57,000 miles) My car has a bad vibration when in gear, but stopped with my foot on the brake. The vibration is not there in neutral, park, or reverse. This only happens before the car warms up. After it warms up, it runs really…
RALLEN
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8
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0 answers

Mercedes ML350 M272 random misfire on cylinder 3 and 4

I have replaced spark plugs but am still getting misfire on cylinder 3 and 4. Sometimes it runs ok. and then other times theres no power.
Krish Naidoo
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8
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1 answer

I own a 1989 Mercedes 560sec that has rpm surges for no real reason

It happens once or twice a month, I could be doing 60 mph, and its almost redlining at 5000 rpm!. Once the vehicle gets to normal operating temperature, and I turn it off for a few minutes and turn it back on, I cannot go over 20 mph without the…
John Santiago
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7
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2 answers

does a car normally continue moving at a constant speed when in gear and the foot is taken off the accelerator pedal?

I remember when driving a passenger car, when I took my foot off the accelerator pedal completely, but remained in gear, the car would normally continue to move at some low speed, different for each gear, more or less constant for each gear…
ria
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7
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2 answers

'83 Mercedes 300D will not start when warm

The car runs great when first started, great pickup, etc. However, if I stop and shut off the engine, it will not start back up. At times I can pump the accelerator 5 or 6 times and then it will start if I keep my foot off the pedal, but not always.…
Steve
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7
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1 answer

1994 Mercedes-Benz C 180 (W202) won't start

Background My 1994 Mercedes-Benz C 180 (W202) won't start. We are in a very cold winter, but even one month ago, it was not that cold. Under the rear view mirror, there are two small lights: one is blue, the other is red. They start blinking red…
pigeon
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