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    W221 S350 Diagnosing Worn Engine Mounts

    I've been trying to track down a vibration in my S350 with limited success and have wondered if engine mounts are the problem. This video shows the engine being revved while the car is in Drive with the brake held down. Is this amount of movement in the engine normal? Is the rather strange noise...
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    W213 E220 2.0D Fumes & Smoke from back of engine

    My E220 brings fumes into the cabin, which comes from visible smoke at the back of the engine. It seems to go come and go with a different note to the exhaust, rather like the sound of an exhaust brake. I can't see any obvious cause. Are there any know issues that might cause this?
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    W221 OM642 S350 Slight Oil Leak - What is this part?

    I have a slight oil leak coming from the left rear of my engine. It appears to be from the area of the large round plastic valve (?) with two tubes connected to it. The following image of a Chrysler OM642 engine shows the part I mean...
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    W221 NTG 3.5 - Firmware updates?

    I've been searching without success for information about firmwaer upgrades for NTG 3.5. I am not talking about the map, but the system. Has there been upgrades and if so can I find a list of changes somewhere? I am particularly interested in finding out if it is possible to get SMS...
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    Is the EGR valve normally so hard to remove? (W221)

    The EGR valve in my S-Class is firmly stuck in place -- barely moves a mm with all sorts of belting and hammering, and apart from the two screw holes there is not much to get a hold of. Is this normal? Does the fact that it is so stuck in place indicate that it is clogged up with carbon?
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    W221 Headlight Unit Adjustment

    I have a facelift W221 and the NS headlight is slightly too far back. Does anyone know if it is possible to adjust the position of the unit without removing the bumper? Thanks
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    Making Sense of Data Downloaded from Instrument Cluster

    We have a list of the entries downloaded using STAR DAS from the Instrument Cluster and just trying to work out what each of the entries mean. Some are obvious like km, days and distance since last service. Others are less clear. Can anyone enlighten me about the following: Tester...
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    OM642 Repeated Vacuum Pump Failure / Oil Feed Issue

    We are now on to our third brake vacuum pump on a car with this engine and they are failing quickly, which may suggest that the oil is not feeding to the vacuum pump. I understand, however, that it is impossible go investigate this properly without removing the left cylinder head to check the...
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