MSD85 and MSD85.1 Repair

MSD85 and MSD85.1 Engine computer Unit (ECU)

Engine computer Units (ECU) Siemens MSD85 and MSD85.1 are used to control

This Siemens MSD85 and MSD85.1 are used for N63 Engines in

Also, Siemens MSD85 and MSD85.1 are used

for S63 Engines in

MSD85 and MSD85.1 are known for internal failure that causes disturbing BSD (Bit Serial Data) communication.

BSD is a bit-serial data interface is a single-wire data bus with a data transfer rate of 1.2 kBd. It's 12V signal level, 830uS = 1200 baud.

Codes for F series are:

00278D - BSD, Alternator : Missing

CD9304 - BSD Data bus communication fault

210901 - BSD, Message; Alternator; Missing

213901 - Power management: reduction or deactivation of individual electrical loads/consumers

After Failure, only way to fix it was to replace DME, that's what dealer offers, and cost is around $2200

We offer repairing internal failure of MSD85 and MSD85.1

Feel free to ask if you have any questions.