Mercedes Ignition Module Up for sales is a OEM Mercedes W124 / w126 chassis inline 6 ignition module.Part number- 0045454632 / 004 545 46 32 , My list shows this fits some models of -300SEC 1986-1991300SE 1986-1991300SEL 1986-1991300SEL 1986-1991300SE 1986-1991300SEC 1986-1991300E 1986-1991300TE 1986-1991There are some variants of these units used on these cars however, you need to check the part number off your original to verify fitment. This is in your engine bay, driver side front area.I only sell the OEM units, never aftermarket so they are the same quality as your original. This module lists for over $3000 from MBUSA, this is listed at merely a fraction of the dealer price. These can commonly cause a no start or intermittent start issue, as well as misfire issues. - If you have no spark, or intermittent no-spark, this is the unit to check. Common causes of problems with these are a faulty alternator that causes voltage spikes, as well as the instillation of the incorrect resistance spark plugs. If you had one of these fail, check this before installing a new unit or it may happen again. This unit guaranteed against DOA (essentially a 1 day warranty), but nothing beyond that as I do not have direct access to the vehicle this is being installed into, therefore I can not verify if you have the correct specification plugs which are critical. Thanks for looking! LARGER PICTURE