Question about 1993 Mercedes-Benz Mercedes Benz 300 Class

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300E 1993 153,000 km

Several electrical problems

-daytime running light quit during winter day

-sliding roof will not engage in partially open position; it slides in and out but not vertically

- no cold air coming out of A/C R12

I want to fix the problem myself....

thank you

[email protected]

Posted by lycopersicon on


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If you have replace your alternator recently and installed an aftermarket (that is not Bosch) this could cause the problem you have. This may also indicate that you need to replace your alternator there are 2 possibilities for the 300 if you have the self leveling rear suspension you need the larger one. The 300 uses only slightly less power than the 300te but still far more than most cars only use Bosch even rebuilt they have an excellent warranty and will pay for towing if it fails. Good Luck To You!!

Posted on Jul 08, 2009


Jason Johnson

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Email me at [email protected] well adress the issues 1 by 1.

Posted on Jun 15, 2009

  • Jason Johnson Jul 09, 2009

    For one car did not come equipped with daytime running lights so that may be wired incorrectly.
    The remote actuator is in the trunk drivers side for the roof, if you can do it from there its the motor or the switch.
    Third you do not have R-12, mercedes used R-134A after 1991, and with most leaks being in the evaporator you probably wont fix it yourself. You might try industrial stop leak in the system and charge with freon.

  • Jason Johnson Apr 13, 2010

    Replace the headlight relay/bulb out indicator.

    Replace switch for the sunroof it wont go up and lube tracks.

    A/C needs recharged most likely or switches on the dryer need replaced.



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