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Mercedes-Benz 300D Questions

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how much does it cost to have the fuel injectors changed?
thanks
Would like to know how to check the current and working condition of the glow plug relay before buying a new relay or new glow plugs. Plugs are 3 years old.
I was driving in snow the other day and it was slipping all over the place does it have a button for traction
My question is on using the service .
My interior light does not come on when when I open either door. The light does come on with the light switch. Is there more than one light in there and how do I get to the bulb(s)?
The car lost power when driving and was only going 5 mph. What may this be?
car smoke when frist starting. what can i do to stop from smoking
My MB is actually 82 It will start in nutral,could it be relay?
this just startrd a buzzing inside of car gages dont work lights wont work park light dont work brake light stopped working
Does the computer [brain] have anything to do with the injector pump on a 1993 300D 2.5 mercedes? The two wires going to the injector pump, I know one turns the pump on what does the other wire do... I still am having problems with no power under pressure... sure could use some help and suggestions. I also need to know the torque setting for this car...
my mercedes starts great but when I try to go up a grade or step down on it it doesn't have any guts or shift down... when it is cold, just starting out, sometimes it runs right , but when it warms up it is gutless again.... love the car but just can't figure it out.... Mercedes garage said it was the vacuum pump and I put a new one on and it does the same thing.... any input would be so helpful ... I have checked vacuum hoses for pressure leaks but everything so far has checked out.. I read a lot of this year and model have the same problem but have never found an answer....
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