Best repair manual for 88 300E

[moohampshire]

Just bought my first MB. A 1988 300E with 124K miles. What is the best repair /service manual for this car. I have seen some on ebay that are a 2 set CD for $12.50. Sent two emails to seller to see if they are from MB, no response. I work on my own cars and need to get a good manual or CD set to do medium to minor repairs.

Thanks for your help in advance