Well flog me with a warm lettuce...................... (P.Keating one time Prime Minister of Australia.)
As 212 man sez.......................
The 135 does Auto Trim (follow up) below 40 knots. Just tried it. It is not very fast but works fine.
The RFM Supplement doesn't mention it and it is not in the AMM Systems Description. Although I am sure it is in the MM for the AP.
There is evidently an APM 2000 Pilot's Manual for the EC135. Never seen one and it does mention in the RFM Supplement that "Section 4.2 Operation - The sequence of AFCS mode shown within is not mandatory."