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

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13
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1answer
4k views

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 ...
10
votes
5answers
948 views

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 ...
8
votes
1answer
58k views

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?
8
votes
1answer
39 views

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 ...
8
votes
1answer
791 views

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 ...
8
votes
0answers
111 views

Mercedes ML350 M272 random misfire on cylinder 3 and 4 [closed]

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.
8
votes
0answers
85 views

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 ...
7
votes
2answers
341 views

'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 ...
7
votes
1answer
44 views

2002 Mercedes E320 - Exhaust getting into the cabin of the vehicle and causing headaches

Experiencing exhaust fumes in the car. It's causing eyes burning and headaches after driving the car for 30 minutes. The Dealer checked and found nothing wrong but every time after driving the car ...
6
votes
3answers
465 views

Does overheating that goes away under high RPMs indicate a sticky thermostat?

Sitting in traffic, my car's thermostat goes up to the red. If I put it in neutral and rev it, it goes up a tiny bit, then suddenly drops back to normal. Is that the thermostat sticking, or something ...
6
votes
2answers
6k views

2008 MB C300 Will not start

My MB C300 will not start. I put the key in and turn it but nothing happens. The radio and internal lights do come on but not the car. The steering wheel is locked and can't put it on Neutral either (...
6
votes
3answers
4k views

What is the best way to remove a stripped head bolt that is deep in the engine?

One of the head bolts on my 1997 Mercedes C230 stripped during removal. It is a 12 point star, I think they made be called triple square splines. The others are about 4 inches long stretch bolts. ...
6
votes
6answers
6k views

what can be the reason 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! - ...
6
votes
1answer
86 views

Trouble starting car, cold weather. MB A140 W168

So, I have a Mercedes-Benz, A140 W168. I moved to Finland about 18ish months ago which is when we bought the car 2nd hand. Last winter temperatures only went down to around -15C (5F) degrees, and ...
6
votes
1answer
18 views

Mercedes E-350, 2006 sedan ignition problem

I own a Mercedes e-350 2006 sedan whose ignition box was vandalized and taken away by vandals. I could not start this car since then and I thought of buying a used ignition box to use on the car with ...
6
votes
3answers
40k views

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 ...
6
votes
0answers
38 views

I have 2001 C240 Mercedes. lately since the weather is getting cold, I have problem starting the car.

I have 2001 C240 Mercedes. lately since the weather is getting cold, I have problem starting the car. when i try to start the car, it makes no sound. a local mechanic says that the starter is ok. ...
6
votes
0answers
70 views

1993 Merc 300SE always stalling soon after startup, fuel pressure tests > 50psi

From the moment car starts to the moment engine stalls, which is about 40 - 60 seconds, fuel pressure is always above 50 psi. Can I safely conclude stalling is not caused by fuel system problems? I ...
5
votes
5answers
2k views

What good is it for an engine to have lower CCs and higher BHP?

I was watching "The Perfect Road Trip 2" by Top Gear, where at some point Richard Hammond is driving a Mercedes A45 AMG. He says that the car develops a whooping 355 BHP, and all that comes from a ...
5
votes
4answers
598 views

Automatic car won't start, steering wheel won't turn, key just makes car click etc - but radio works?

Someone else was in the driver seat and they were trying to drive. At one point I took out the key and when he put it back in the car wouldn't start. This was yesterday and it still won't start. The ...
5
votes
2answers
2k views

Replacing the head gasket in a 1993 Mercedes 300ce

Is replacing the head gasket in a 1993 Mercedes 300ce, an expensive repair? I've been told it is better to just replace the engine all together. Is it a tough job for a backyard mechanic or a diy ...
5
votes
1answer
7k views

Mercedes start/stop system doesn't always kick in

We're the (humbled) owners of a 2011 Class B Mercedes with an inbuilt ECO start/stop system. As far as I understand this is how it's supposed to work: Gear in neutral. Press the brake pedal all the ...
5
votes
2answers
621 views

engine underpowered in idle - what can be done to improve a diesel engine power at low RPM just a bit?

There is an engine which is a bit underpowered when idling, it can not even keep the car moving on a flat road when in gear and idling at 700..800 RPM - see link. What can be done to improve its ...
5
votes
2answers
2k views

How to determine if a Mercedes key is original?

I have made a duplicate of my car key ( 2001 E320) and I want to know if the key (reprogrammed used key) is original; manufactured legitimately by Mercedes or an authorized manufacturer. I didn't ...
5
votes
1answer
1k views

Does repeated turning on/off Xenon HID headlights harm them?

I've got Xenon headlights and my car has a feature which automatically turns the headlights on at night. Currently I'm hesitant to use the auto-on feature because the headlights turn on when I start ...
5
votes
0answers
28 views

Mercedes CL500 Water pump & AC

I am no mechanic and do not have any mechanic knowledge etc and would like to hear from experts here regarding an issue. My query ... On a Mercedes CL500 (2002 model) the water pump, idler pulley &...
4
votes
2answers
5k views

My car's steering wheel rotates to right when I lift my hands off

I have Mercedes E350 2009. When I hold steering wheel straight, car drives straight. When I lift my hands off, car and steering wheel tend to turn right. What could be the reason here?
4
votes
1answer
73 views

Can I use “Designed for BMW” Michelin tyres with a non BMW?

I am looking for a Michelin Pilot Super Sport R18 225/40R18 88Y and 245/35R18 92Y for my Mercedes-Benz W208, but this tyres marked on the website as "Designed for BMW". What does it mean? What are ...
4
votes
2answers
4k views

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 ...
4
votes
1answer
32 views

How to fix 2007 Mercedes SLK daytime running lights?

I've got a 2007 Mercedes-Benz SLK (R171). My daytime running lights have died, and I'm a little puzzled as to how to go about fixing them. The stock headlights have been replaced by aftermarket ...
4
votes
1answer
110 views

Proper operating temp for a 1983 Mercedes 380SL?

My 1983 Mercedes 380SL seems to be running hotter than I like. It settles down at right at 100 C by the instrument panel temp gauge after running at highway speed for 10 minutes or so. When I first ...
4
votes
1answer
6k views

How to remove driver's side front door handle on a Mercedes Benz 2007 A-class W169?

I am stuck trying to remove the door lock barrel from the inner mounted door module on the driver's side front door of my Mercedes Benz 2007 A-class W169. I have undone the Torx T15 screw from the ...
4
votes
3answers
65 views

MB 2004 C320 wagon overheating at idle

In December 2015, my 2004 C-class wagon overheated (temp light came on, nothing dramatic) for the very first time while stuck in traffic for 30 minutes. I had it towed to a nearby MB dealership (not ...
4
votes
1answer
49 views

Mercedes c240 4matic: permanent AWD?

I plan to buy a car (a Mercedes c240 4matic from 2003) with AWD. I heard, all-wheel drive is really good in winter, and maybe on the mountains. But in sommer it's only a waste of gas. The engine has ...
4
votes
1answer
40 views

Mercedes Benz E300 BlueTEC HYBRID

Could anyone please tell me what BlueTEC HYBRID and Blue Efficiency mean and the pros and cons of those ? Are those better than BMWs Efficient Dynamics ? Common faults they undergo ? Maintenance ...
4
votes
1answer
671 views

Is this repair estimate for misfiring and fuel trim on a '98 Mercedes reasonable?

Just got a '98 Benz ml320 and two days later it cut off on me, twice, within about 5 minutes. I took it for a diagnostic. I'm wondering how overpriced this estimate is and possible ideas of best ...
4
votes
1answer
861 views

Oil pressure decresases when I step on the gas

I have a 1982 Mercedes W123 with a 2L gas engine. I have noticed some weirdness with the oil pressure and want to know if this is an indication of a problem. Let's say I am driving at 60km/h and the ...
4
votes
1answer
1k views

How can I remove heating blower fan from the blower motor - Mercedes-Benz 308D van?

How I can remove the plastic fan from the axle of the heating blower motor? The vehicle is a Mercedes-Benz 308D van from 1992. The blower motor is a Bosch part number 0 130 007 027. I know that also ...
4
votes
0answers
34 views

(2003 Mercedes SLK230 Kompressor) Disarm the Alarm without Key Fob

I'm writing because my key fob stopped working, this is distressing because the last time my fob stopped working and I opened my door with my key alone, the alarm went off. The entire time this last ...
4
votes
0answers
19 views

Which gapping is for my car 1999 E320 4matic sedan

Okay I've been looking all over trying to see if there is any information but i haven't came across one. Asking for help I'm about to replace all 12 plugs need some answers so I start gapping. I ...
4
votes
0answers
19 views

Mercedes veto Exhaust

Just got a new exhaust fitted, the part that goes from the front wheel area all the way to the back. And NOW there is a smell of exhaust fumes in the veacle, that seams to be coming from the vents. ...
4
votes
0answers
238 views

How to remove engine cooling fan from a W169 Mercedes A-Class

How do you remove engine cooling fan from A-Class Mercedes W169?
4
votes
0answers
216 views

Evap. circuit malfunction on Mercedes Benz

I have a 2002 ML320 suv. The CEL is on, and the code is P0446. It states that there is something wrong with the evap. system circuit, specifically at the charcoal canister shut-off valve. I've tried ...
3
votes
1answer
69 views

Is it fine to use higher octane gasoline than what is recommended on the fuel cap sticker

I've got a 2000 W202 Mercedes C240. It's got a V-shaped, six cylinder gasoline engine. On the fuel cap, it says RON 95 EN 228. And in the manual also it says "Use only Premium Unleaded petrol". I ...
3
votes
2answers
173 views

my van is not able to drive over a curb

My van is not able to drive over a curb. Just a normal curb, that other vehicles are able to drive their wheels over, and mine is not. What might be the problem and how to fix it? It is a Mercedes-...
3
votes
1answer
29 views

Can I fix the power seat in my ML430 myself?

My 1999 ML430 is on its last legs, and one of the issues is that the power driver's seat is stuck in one position, all the way at the back and partially reclined (my husband can drive it now, but ...
3
votes
1answer
242 views

Mercedes OM636: Can I Resolder Wire to Coolant Temperature Sensor?

The wire contact connected to the Coolant Temperature Sensor of my Mercedes OM636 (Boat engine same as Mercedes 170D, 180D) was corroded and got accidentally snapped off. Can I just solder this back ...
3
votes
1answer
58 views

98 Mercedes ML 320 - Overheating Issue

My car keeps over heating when I get on the freeway. It's fine on city streets. I put antifreeze in it. It seems like it runs out kind of fast but I havent noticed any leaking.
3
votes
1answer
63 views

Building a custom car

I'm curious, is it possible (and how hard would it be) to build a custom car with an engine from a different brand than the transmission? For example, I'd get an old V12 Mercedes engine (with two ...
3
votes
1answer
263 views

Two Mercedes Electronic Keys - One Works As a Remote - One Works to Start The Car - How Can These Be Combined?

I just bought a 2005 Mercedes C230 and I have two Mercedes electronic keys - one works as a remote - one works to start the car - how can these be combined/programmed so they are both fully functional?...